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636-94-2Relevant articles and documents
The influence of different coordination environments on one-dimensional Cu(II) coordination polymers for the photo-degradation of organic dyes
Hussain, Navid,Bhardwaj, Vimal K.
, p. 7697 - 7707 (2016)
Three new Cu(ii) coordination polymers, namely, {[Cu3(L1)(NO3)2(DMF)(H2O)]·3(DMF)}n (1), [Cu3(L1)(Cl)2(DMF)2]n (2) and [Cu3(L2)(NO3)4(H2O)4]n (3), were synthesized from pyridine-2,6-dicarbohydrazide based imine linked tritopic ligands. All the complexes were characterized using elemental analysis, IR, UV-vis spectroscopy and ESI-MS. The solid state structures of complexes 1-3 were determined using single crystal X-ray crystallography. The complexes contain trinuclear copper units connected through different anions that lead to the formation of one dimensional (ID) chain structures. Depending upon the anion of the copper salt and donor atoms of the ligands used in complexation, a small variation in the structures was observed. In complex 1, the trinuclear copper units are connected by phenoxo-bridging (μ2-O-) along with one coordinated water molecule, whereas complex 2 is connected through chloride bridging (μ2-Cl) and complex 3 is connected through nitrate ions (μ-[O-N-O]) along with four water molecules. Photo-catalytic activities of the synthesized complexes (1-3) were investigated. All the complexes were found to be photo-catalytically active; however, the distinct coordination environment of the metal ions (i.e. difference in the coordinated water molecules and donor sites of ligands) played a significant role in the catalytic activities. Therefore, this study presents comparative photo-catalytic studies of different coordination environments of metal ions in one-dimensional Cu(ii) coordination polymers. The results provide a potential pathway for the rational design of more efficient photo-catalysts.
Carboxyfullerene decorated titanium dioxide nanomaterials for reactive oxygen species scavenging activities
Yang, Kai-Cheng,Zheng, Jia-Huei,Chen, Yen-Ling,Lee, Kuen-Chan,Cho, Er-Chieh
, p. 53025 - 53033 (2016)
Titanium dioxide nanomaterials offer superior protection for human skin against ultraviolet light. However, some reports have indicated that they might be associated with adverse effects such as cytotoxicity or reactive oxygen species (ROS) under UV-irrad
Improving photocatalytic reduction of 4-nitrophenol over ZrO2-TiO2 by synergistic interaction between methanol and sulfite ions
Guerrero-Araque, Diana,Acevedo-Pe?a, Próspero,Ramírez-Ortega, David,Gómez, Ricardo
, p. 12655 - 12663 (2017)
The effect of two sacrificial agents (methanol and sodium sulfite) on the photocatalytic reduction of 4-nitrophenol employing a ZrO2-TiO2 photocatalyst is reported. The experimental results showed a decrease in the generation of OH r
New insights into fluorinated TiO2 (brookite, anatase and rutile) nanoparticles as efficient photocatalytic redox catalysts
Wang, Yafang,Li, Liping,Huang, Xinsong,Li, Qi,Li, Guangshe
, p. 34302 - 34313 (2015)
The synthesis of anionic-modified nanostructures with specific properties is often hindered by difficulty in tuning the material compositions without sacrificing phase purity and sample uniformity. Here, we present a novel methodology using NH4
Facile Synthesis of Carbon Dots@2D MoS2 Heterostructure with Enhanced Photocatalytic Properties
Li, Ning,Liu, Zhengtang,Liu, Ming,Xue, Chaorui,Chang, Qing,Wang, Huiqi,Li, Ying,Song, Zhenchao,Hu, Shengliang
, p. 5746 - 5752 (2019)
To better utilize carbon dots (CDs) as efficient photocatalysts, an excellent strategy of constructing CDs@MoS2 heterostructure is presented. Here a facile sonication-hydrothermal method is utilized to synthesize CDs@MoS2. Such heter
DNA Photocleavage by Non-innocent Ligand-Based Ru(II) Complexes
Zhang, Yangyang,Zhou, Qianxiong,Zheng, Yue,Li, Ke,Jiang, Guoyu,Hou, Yuanjun,Zhang, Baowen,Wang, Xuesong
, p. 4296 - 4300 (2016)
In this work, we demonstrate for the first time that [Ru(bpy)2(R-OQN)]+ complexes (bpy = 2,2′-bipyridine, R-OQN = 5-chloro-8-oxyquinolate or 5-bromo-8-oxyquinolate) are able to generate hydroxyl radicals and cleave DNA effectively up
Deciphering a Nanocarbon-Based Artificial Peroxidase: Chemical Identification of the Catalytically Active and Substrate-Binding Sites on Graphene Quantum Dots
Sun, Hanjun,Zhao, Andong,Gao, Nan,Li, Kai,Ren, Jinsong,Qu, Xiaogang
, p. 7176 - 7180 (2015)
Abstract The design and construction of efficient artificial enzymes is highly desirable. Recent studies have demonstrated that a series of carbon nanomaterials possess intrinsic peroxidase activity. Among them, graphene quantum dots (GQDs) have a high en
Enhanced Photoexcited Carrier Separation in Oxygen-Doped ZnIn2S4Nanosheets for Hydrogen Evolution
Yang, Wenlong,Zhang, Lei,Xie, Junfeng,Zhang, Xiaodong,Liu, Qinghua,Yao, Tao,Wei, Shiqiang,Zhang, Qun,Xie, Yi
, p. 6716 - 6720 (2016)
Limited by the relatively sluggish charge-carrier separation in semiconductors, the photocatalytic performance is still far below what is expected. Herein, a model of ZnIn2S4(ZIS) nanosheets with oxygen doping is put forward to obtai
Fabrication of ZnO, ZnS, Ag-ZnS, and Au-ZnS microspheres for photocatalytic activities, CO oxidation and 2-hydroxyterephthalic acid synthesis
Choi, Young In,Lee, Seungwon,Kim, Seog K.,Kim, Young-Il,Cho, Dae Won,Khan, Mohammad Mansoob,Sohn, Youngku
, p. 46 - 56 (2016)
This paper reports the synthesis of ZnS microspheres with cubic and hexagonal crystal phases using a solvothermal method. These materials were characterized by a range of techniques. The effects of Au and Ag-doping on ZnS were also examined. Hexagonal phase ZnO microspheres could be obtained by a CO oxidation process over the ZnS microspheres. The onset of CO oxidation occurred above 350 °C, which was increased by Au and Ag doping. The synthesized materials were used for the photocatalytic degradation of mixed dyes {methylene blue (MB) + methyl orange (MO) + rhodamine B (RhB)}. The observed photocatalytic degradation rate over the photocatalysts was in the order, RhB MB 蠐 MO. The photocatalytic degradation activity of the synthesized materials was observed in the order, Au-ZnS ≈ Ag-ZnS 蠐 ZnS ZnO. ZnO was ～6 times more efficient in the photocatalytic synthesis of 2-hydroxyterephthalic acid than the ZnS and metal-doped ZnS. These results further support the importance and wide applications of the synthesized ZnS, Ag-ZnS, Au-ZnS and ZnO microspheres.
Graphene nanodots decorated ultrathin P doped ZnO nanosheets as highly efficient photocatalysts
Zhu, Yuankun,Bu, Xiuming,Wang, Ding,Wang, Ping,Chen, Aiying,Li, Qian,Yang, Junhe,Wang, Xianying
, p. 78846 - 78851 (2016)
A novel kind of highly efficient photocatalyst composed of ultrathin P doped ZnO (ZnO:P) nanosheets decorated with graphene nanodots (GNDs) was fabricated. Taking the unique advantages of the ultrathin ZnO nanosheet structure, and the excellent properties
Enhanced oxidase/peroxidase-like activities of aptamer conjugated MoS2/PtCu nanocomposites and their biosensing application
Qi, Cui,Cai, Shuangfei,Wang, Xinhuan,Li, Jingying,Lian, Zheng,Sun, Shanshan,Yang, Rong,Wang, Chen
, p. 54949 - 54955 (2016)
Hybrid composite materials are particularly useful and offer great opportunities for catalysis due to their multifunctionalities. Taking advantage of the high catalytic properties of bimetallic alloy nanoparticles, the large specific surface area and co-catalytic function of MoS2 nanosheets, we prepare a novel MoS2/PtCu nanocomposite with intrinsic high oxidase- and peroxidase-like activity. The preparation of MoS2/PtCu nanocomposites does not require organic solvents or high temperature. The introduction of single-layer MoS2 nanosheets not only improves porous PtCu nanoparticles with a fine dispersion, but also readily incorporates recognition elements. As a mimic oxidase, the independence of hydrogen peroxide shows the good biocompatibility of MoS2/PtCu for promising bioapplications. On the basis of oxidase-like activity, a novel colorimetric aptasensor (apt-MoS2/PtCu) was developed and its application in the colorimetric detection of cancer cells with different MUC1-protein densities was demonstrated. The as-prepared apt-MoS2/PtCu shows good sensitivity and selectivity to targeting cells. The proposed strategy will facilitate the utilization of MoS2-based nanocomposites with high oxidase/peroxidase activities in biotechnology, biocatalysis etc.
Ionic-Liquid-Assisted Microwave Synthesis of Solid Solutions of Sr1?xBaxSnO3 Perovskite for Photocatalytic Applications
Alammar, Tarek,Slowing, Igor I.,Anderegg, Jim,Mudring, Anja-Verena
, p. 3387 - 3401 (2017)
Nanocrystalline Sr1?xBaxSnO3 (x=0, 0.2, 0.4, 0.8, 1) perovskite photocatalysts were prepared by microwave synthesis in an ionic liquid (IL) and subsequent heat-treatment. The influence of the Sr/Ba substitution on the stru
Enhancing gas adsorption and separation capacity through ligand functionalization of microporous metal-organic framework structures
Zhao, Yonggang,Wu, Haohan,Emge, Thomas J.,Gong, Qihan,Nijem, Nour,Chabal, Yves J.,Kong, Lingzhu,Langreth, David C.,Liu, Hui,Zeng, Heping,Li, Jing
, p. 5101 - 5109 (2011)
Hydroxyl- and amino- functionalized [Zn(BDC)(TED)0.5] ·2DMF·0.2H2O leads to two new structures, [Zn(BDC-OH)(TED)0.5]·1.5DMF·0.3H2O and [Zn(BDC-NH2)(TED)0.5]·xDMF·yH2O (BDC=terephthalic acid, TED=triethylenediamine, BDC-OH=2-hydroxylterephthalic acid, BDC-NH2=2-aminoterephthalic acid). Single-crystal X-ray diffraction and powder X-ray diffraction studies confirmed that the structures of both functionalized compounds are very similar to that of their parent structure. Compound [Zn(BDC)(TED)0.5]·2DMF·0.2H 2O can be considered a 3D porous structure with three interlacing 1D channels, whereas both [Zn(BDC-OH)(TED)0.5]·1.5DMF·0. 3H2O and [Zn(BDC-NH2)(TED)0.5] ·xDMF·yH2O contain only 1D open channels as a result of functionalization of the BDC ligand by the OH and NH2 groups. A notable decrease in surface area and pore size is thus observed in both compounds. Consequently, [Zn(BDC)(TED)0.5]·2DMF·0. 2H2O takes up the highest amount of H2 at low temperatures. Interestingly, however, both [Zn (BDC-OH)(TED)0.5] ·1.5DMF·0.3H2O and [Zn(BDC-NH2)(TED) 0.5] ·xDMF·yH2O show significant enhancement in CO2 uptake at room temperature, suggesting that the strong interactions between CO2 and the functionalized ligands, indicating that surface chemistry, rather than porosity, plays a more important role in CO2 adsorption. A comparison of single-component CO2, CH4, CO, N2, and O2 adsorption isotherms demonstrates that the adsorption selectivity of CO2 over other small gases is considerably enhanced through functionalization of the frameworks. Infrared absorption spectroscopic measurements and theoretical calculations are also carried out to assess the effect of functional groups on CO2 and H2 adsorption potentials.
Preparation of a ZnO/TiO2 vertical-nanoneedle-on-film heterojunction and its photocatalytic properties
Li, Delong,Zhang, Yupeng,Wu, Wenhui,Pan, Chunxu
, p. 18186 - 18192 (2014)
This paper introduces a process to prepare a novel ZnO/TiO2 heterojunction composite with ZnO nanoneedles vertically grown on a TiO 2 film via micro-arc oxidation (MAO), pulse plating and thermal oxidation. Firstly a TiO2
Magnetite/bi-doped carboxylate-rich carbon spheres-a highly efficient magnetic photocatalyst based on dimetallic FeII/FeIII and BiIII/BiIV photoredox cycles
Luo, Zhijun,Qu, Lingling,Han, Tingting,Zhang, Zhen,Shao, Xiaoling,Wu, Xiangyang,Chen, Zhong-Lin
, p. 994 - 1000 (2014)
A new magnetically separable visible-light photocatalyst, magnetite/Bi-doped carboxylate-rich carbon spheres (Bi-MCRCSs), was synthesized under ultrasonic irradiation by using magnetite/carboxylate-rich carbon spheres (MCRCSs) as a precursor. The Bi-MCRCS
Ti0.89Si0.11O2 single crystals bound by high-index {201} facets showing enhanced visible-light photocatalytic hydrogen evolution
Wu, Long,Jiang, Hai Bo,Tian, Feng,Chen, Zhigang,Sun, Chenghua,Yang, Hua Gui
, p. 2016 - 2018 (2013)
Silicon (Si) doped anatase titanium dioxide (Ti0.89Si 0.11O2) single crystals bound by high-index {201} facets and high-energy {001} facets were synthesized by a facile method. It was found that the Si-doping can widely ex
Cu(0) nanoparticle-decorated functionalized reduced graphene oxide sheets as artificial peroxidase enzymes: Application for colorimetric detection of Cr(vi) ions
Borthakur, Priyakshree,Boruah, Purna K.,Das, Manash R.,Szunerits, Sabine,Boukherroub, Rabah
, p. 1404 - 1414 (2019)
Graphene oxide (GO) sheets were functionalized by a "click" chemistry approach using azide modified GO and alkynyl-terminated d(+)-glucose precursors to produce glucose terminated hydrophilic GO surfaces. This hydrophilic functionalized GO surface was uti
Mechanistic study of visible light driven photocatalytic degradation of EDC 17α-ethinyl estradiol and azo dye Acid Black-52: Phytotoxicity assessment of intermediates
Naraginti, Saraschandra,Li, Yi,Wu, Yunbo,Zhang, Chi,Upreti, Akhanda Raj
, p. 87246 - 87257 (2016)
The present study evaluated the phytotoxicity of degraded intermediates of an endocrine-disrupting compound (EDC) 17α-ethinyl estradiol (EE2) and toxic azo dye Acid Black-52 (AB-52) in photocatalytic degradation. A novel bimetallic (silver and zirconium)
Terephthalic acid: A dosimeter for the detection of hydroxyl radicals in vitro
Barreto, Jose C.,Smith, Gregory S.,Strobel, Nathaniel H. P.,McQuillin, Pamela A.,Miller, Thomas A.
, p. PL89-PL96 (1994)
Hydroxylation reactions of aromatic compounds have been used to detect hydroxyl radicals produced by gamma irradiation and ultrasound. The present study investigated the suitability of terephthalic acid (THA) as a hydroxyl radical dosimeter for general us
Sonocatalytic performance of AgBr in the degradation of organic dyes in aqueous solution
Wu, Yun,Song, Limin,Zhang, Shujuan,Wu, Xiaoqing,Zhang, Shuna,Tian, Haifeng,Ye, Jiayi
, p. 14 - 18 (2013)
AgBr sonocatalysts were prepared by a simple method. The AgBr sonocatalysts exhibited excellent sonocatalytic activities against the decolorization of methylene blue, rhodamine B, and methyl orange. By determining the content of ·OH radicals in the ultras
One-step hydrothermal synthesis of C, W-codoped mesoporous TiO2 with enhanced visible light photocatalytic activity
Xiao, Qi,Gao, Lan
, p. 286 - 292 (2013)
C, W-codoped mesoporous TiO2 is prepared by one-step hydrothermal method and characterized by X-ray diffraction (XRD), Raman spectra, transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoe
Visible-light-responsive β-Rhombohedral boron photocatalysts
Liu, Gang,Yin, Li-Chang,Niu, Ping,Jiao, Wei,Cheng, Hui-Ming
, p. 6242 - 6245 (2013)
It's elemental! β-Rhombohedral boron was investigated as an elemental photocatalyst. Boron crystals were found to be photocatalytically active in the generation of .OH radicals under irradiation with visible light (see picture); however, the pr
Microwave-induced catalytic oxidation of malachite green under magnetic Cu-ferrites: New insight into the degradation mechanism and pathway
Liu, Xueyan,An, Shuai,Shi, Wen,Yang, Qi,Zhang, Lei
, p. 243 - 250 (2014)
Increasing attention has been paid to magnetic ferrites due to their high catalytic activity toward environmental contaminants. However, there is little information related to the generation of active species by magnetic ferrites under microwave (MW) irra
The influence of the morphology of 1D TiO2 nanostructures on photogeneration of reactive oxygen species and enhanced photocatalytic activity
Rosales, Maibelin,Zoltan, Tamara,Yadarola, Ciro,Mosquera, Edgar,Gracia, Francisco,García, Andreina
, p. 59 - 69 (2019)
The influence of morphology in one-dimensional (1D) TiO2 nanostructures—specifically nanotubes (TNT), nanofibers (TNF), nanorods (TNR), and nanowires (TNW)—on the photogeneration of reactive oxygen species (ROS) and the resulting effect on phot
Modification of tungsten trioxide with ionic liquid for enhanced photocatalytic performance
Liu, Jingjing,Han, Suiqi,Li, Jia,Lin, Jun
, p. 37556 - 37562 (2014)
To develop WO3, a narrow band gap semiconductor with a deep valence band, into an efficient visible light photocatalyst, we modified WO 3 with an ionic liquid [Bmim]I through a facile impregnation method in this study. Upon visible l
Fluorogenic naked eye “turn-on” sensing of hypochlorous acid by a Zr-based metal organic framework
Biswas, Shyam,Ghosh, Subhrajyoti,Nandi, Soutick,S. K., Mostakim
supporting information, p. 14211 - 14217 (2021/08/16)
Hypochlorous acid (HOCl) is involved in several physiological and pathological functions. Hence, sensitive and accurate detection of HOCl is much needed. We report herein a new (dimethylthiocarbamoyl)oxy functionalized aqua stable Zr-UiO-66 MOF for the specific fluorogenic recognition of HOCl in a pure aqueous medium. The activated material (1′) exhibited a dramatic increase in emission intensity (～46-fold) in the presence of HOCl. More importantly, the material has remarkable selectivity towards HOCl over other reactive oxygen species (ROS) and reactive nitrogen species (RNS). The “turn-on” nature of the material after the inclusion of HOCl could be detected by the naked eye under a UV lamp. Furthermore, a linear steady increase was observed with the gradual addition of HOCl solution over a wide linear range of 0-28 μM and the estimated LOD value was found to be 1.22 μM. HOCl-mediated oxidative cleavage of the pendant from the (dimethylthiocarbamoyl)oxy functionality to the hydroxyl functionality is the main reason behind the dramatic fluorescence enhancement of the present compound. The present compound is the first ever MOF based detector for the “turn-on” sensing of HOCl.
DIMER COMPOUNDS, AND USE IN BINDING TOXIC REPEATS OF RNA
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Paragraph 0131; 0132, (2020/07/16)
Provided herein are compounds and methods for modulating abnormal repeat expansions of gene sequences. More particularly, provided are dimeric inhibitors of RNA and the uses of such inhibitors in regulating nucleotide repeat expansions, e.g., to treat Myotonic Dystrophy Type 1 (DM1), Myotonic Dystrophy Type 2 (DM2), Fuchs dystrophy, Huntington Disease, Amyotrophic Lateral Sclerosis, or Frontotemporal Dementia.
