10028-70-3Relevant articles and documents
Ultralong Phosphorescence from Organic Ionic Crystals under Ambient Conditions
Cheng, Zhichao,Shi, Huifang,Ma, Huili,Bian, Lifang,Wu, Qi,Gu, Long,Cai, Suzhi,Wang, Xuan,Xiong, Wei-Wei,An, Zhongfu,Huang, Wei
, p. 678 - 682 (2018)
A new type of materials, organic salts in the crystal state, have ultralong organic phosphorescence (UOP) under ambient conditions. The change of cations (NH4+, Na+, or K+) in these phosphors gives access to tun
Cyanostilbene-based near-infrared emissive platinum(II) metallacycles for cancer theranostics
Ma, Lingzhi,Yang, Tianfeng,Zhang, Zeyuan,Yin, Siping,Song, Zhongxiao,Shi, Wen,Chu, Dake,Zhang, Yanmin,Zhang, Mingming
, p. 1942 - 1946 (2019)
In this work, a near-infrared emissive dipyridyl ligand was synthesized and used to prepare three platinum(II) metallacycles with different shapes via metal-coordination-driven self-assembly with different platinum(II) precursors. These metallacycles were further used for both cell imaging and cancer therapy, offering a new type of theranostic agents towards cancer treatment.
A Reduced Graphene Oxide/Disodium Terephthalate Hybrid as a High-Performance Anode for Sodium-Ion Batteries
Cao, Tengfei,Lv, Wei,Zhang, Si-Wei,Zhang, Jun,Lin, Qiaowei,Chen, Xiangrong,He, Yanbing,Kang, Fei-Yu,Yang, Quan-Hong
, p. 16586 - 16592 (2017)
As a promising candidate for large-scale energy storage systems, sodium-ion batteries (SIBs) are experiencing a rapid development. Organic conjugated carboxylic acid anodes not only have tailorable electrochemical properties but also are easily accessible. However, the low stability and electrical conductivity hamper their practical applications. In this study, disodium terephthalate (Na2TP), the most favorable organic conjugated carboxylic acid anode material for SIBs, was proposed to integrate with graphene oxide (GO) by an anti-solvent precipitation process, which ensures the uniform and tight coating of GO on the Na2TP surface. GO is electrochemically reduced during the first several cycles of the electrochemical measurement, which buffers the volume change and improves the electrical conductivity of Na2TP, resulting in a better cyclic and rate performance. The incorporation of only 5 wt % GO onto Na2TP leads to a reversible capability of 235 mA h g?1 after 100 cycles at a current rate of 0.1 C, which is the best among the state of the art organic anodes for SIBs. The one-step synthesis together with the low costs of the raw materials show a promise for the scalable preparation of anode materials for practical SIBs.
Organic Thiocarboxylate Electrodes for a Room-Temperature Sodium-Ion Battery Delivering an Ultrahigh Capacity
Zhao, Hongyang,Wang, Jianwei,Zheng, Yuheng,Li, Ju,Han, Xiaogang,He, Gang,Du, Yaping
, p. 15334 - 15338 (2017)
Organic room-temperature sodium-ion battery electrodes with carboxylate and carbonyl groups have been widely studied. Herein, for the first time, we report a family of sodium-ion battery electrodes obtained by replacing stepwise the oxygen atoms with sulfur atoms in the carboxylate groups of sodium terephthalate which improves electron delocalization, electrical conductivity and sodium uptake capacity. The versatile strategy based on molecular engineering greatly enhances the specific capacity of organic electrodes with the same carbon scaffold. By introducing two sulfur atoms to a single carboxylate scaffold, the molecular solid reaches a reversible capacity of 466 mAh g?1 at a current density of 50 mA g?1. When four sulfur atoms are introduced, the capacity increases to 567 mAh g?1 at a current density of 50 mA g?1, which is the highest capacity value reported for organic sodium-ion battery anodes until now.
A polyimide based all-organic sodium ion battery
Banda, Harish,Damien, Dijo,Nagarajan, Kalaivanan,Hariharan, Mahesh,Shaijumon, Manikoth M.
, p. 10453 - 10458 (2015)
Developing new approaches to improve the performance of organic electrodes for rechargeable sodium batteries is important. Here, we report studies on N,N′-diamino-3,4,9,10-perylenetetracarboxylic polyimide (PI) as a novel cathode for a sodium battery and demonstrate an all-organic sodium ion battery using this polyimide as the cathode and disodium terephthalate (NaTP) (pre-sodiated) as the anode. The synthesised PI exhibits excellent electrochemical properties, when studied as the cathode for sodium batteries, with a reversible capacity of 126 mA h g-1 along with good capacity retention and rate capability, in the voltage range of 1.5 to 3.5 V vs. Na+/Na. The all-organic sodium ion full cell delivered an initial capacity of 73 mA h g-1, with an average cell voltage of 1.35 V. The attractive electrochemical performance combined with the design flexibility of a PTCDA based PI material, offer new possibilities for the development of efficient all-organic sodium ion batteries.
Inorganic-organic covalent hybrid of polyoxometalate-calixarene: Synthesis, characterization and enzyme mimetic activity
Narkhede, Nilesh,Uttam, Bhawna,Rao, Chebrolu Pulla
, p. 337 - 342 (2018)
The inorganic-organic hybrid based on covalently attached trilacunary phosphotungstate and calixarene conjugate (POM-Calix hybrid) has been synthesized via facile click chemistry approach. The characterization studies showed that both the moieties are present together in the hybrid upon covalent modification. The morphology of the hybrid was studied by SEM, TEM and AFM analyses suggesting spherical shaped nanoparticles of 40–60 nm size for the hybrid. The POM-Calix hybrid was successfully employed to demonstrate peroxidase-like activity for the oxidation of the model substrate, viz., o-phenylenediamine (OPD), for the enzyme. The activity of the POM-Calix hybrid was ～170% greater than that exhibited by simple POM and this is mainly attributed to the introduction of hydrophobic character by the covalently attached calixarene conjugate and the hydrophobicity is supported by the contact angle measurement. From the kinetic studies, the Michaelis constants, Km and Vmax were estimated to be 2.55 mM and 0.756 × 10?8 M s?1, respectively. It was observed that, the POM-Calix hybrid facilitates the formation of [rad]OH radicals when treated with H2O2 which eventually results in the oxidation of the substrate. The POM-Calix hybrid exhibits excellent enzyme-like activity over a wide pH range, which would enable its bio-applications at physiological conditions.
Dramatic luminescence signal from a Co(II)-based metal-organic compound due to the construction of charge-transfer bands with Al3+ and Fe3+ ions in water: Steady-state and time-resolved spectroscopic studie
Daga, Pooja,Majee, Prakash,Singha, De Bal Kanti,Manna, Priyanka,Hui, Sayani,Ghosh, Ananta Kumar,Mahata, Partha,Mondal, Sudip Kumar
, p. 4376 - 4385 (2020)
To study the photophysics and understand the mechanism of metal ion sensing, a luminescent cobalt-based metal-organic compound, [Co(bpds)(bdc)(H2O)2]·bpds (1), was synthesized at room temperature from 4,4-bipyridyl disulphide (bpds) and 1,4-benzene dicarboxylic acid (bdc) by layer diffusion. Structure determination based on single-crystal X-ray analysis revealed a parallel interpenetrated structure of two-dimensional layers along with a layer of uncoordinated bpds ligand. An aqueous suspension of 1 showed intense blue emission at 421 nm. In the presence of few micromolar of Al3+ ions, a dramatic change in the luminescence spectrum around an isoemissive point was observed with the appearance of a new peak at 380 nm. A similar phenomenon was observed in the presence of Fe3+ ions. For other metal ions, no significant changes in the luminescence spectrum of 1 were observed. Detailed lifetime decay analysis and Fourier-transform infrared spectroscopy revealed that Al3+ ions form charge-transfer complexes (or adducts) with uncoordinated bpds ligands through pyridine nitrogen atoms, resulting in a new emission peak at 380 nm. Time-resolved study revealed that the quenching of luminescence was dynamic in nature and associated with an increase in the non-radiative rate constant. Moreover, the luminescence property of 1 was ultrasensitive to the presence of Al3+ and Fe3+ ions in water, even in a mixture of many other ions, with detection limits of 0.35 and 0.25 μM, respectively.
Method for preparing agricultural fungicide
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Paragraph 0013, (2017/06/29)
The invention discloses a method for preparing an agricultural fungicide. The method includes the following steps: adding phthalic acid into a sodium hydroxide solution to prepare a clarified para-phthalic sodium solution, adding an adjuvant agent into the clarified para-phthalic sodium solution, stirring the solution for a period of time, adding a soluble copper compound solution, heating the solution to an appropriate temperature, continuing stirring, and conducting filtering and washing to obtain copper terephthalate; adding copper terephthalate and a thickening agent in water, stirring the solution, then conducting wet grinding until the particle size of copper terephthalate is less than 5 micrometers, and conducting filtering and drying to obtain the target product. The preparation method is simple and easy to operate, and the obtained insecticide is a uniform suspension liquid, not settled after being stored for a long time and lasting in bactericidal effect. The agricultural fungicide is directly sprayed or sprayed after being diluted, and rapid and easy to use.
Organic sodium terephthalate@graphene hybrid anode materials for sodium-ion batteries
Wang, Ying,Kretschmer, Katja,Zhang, Jinqiang,Mondal, Anjon Kumar,Guo, Xin,Wang, Guoxiu
, p. 57098 - 57102 (2016/07/07)
In the search for high-performance electrodes for sodium-ion battery applications, there is a high demand for organic materials with satisfactory electrochemical performances, especially high rate capabilities. Herein, we report an organic based composite, sodium terephthalate@graphene (Na2TP@GE) hybrid synthesized via freeze-drying technique. This material shows an interconnected, multi-channelled monolith structure, which resulted in outstanding rate capability for sodium storage. This hybrid material demonstrated a high reversible capacity of 268.9 mA h g-1 and prolonged cyclability with capacity retention of 77.3% over 500 cycles.
Relationship between interlayer anions and photoluminescence of layered rare earth hydroxides
Kim, Hyunsub,Lee, Byung-Il,Jeong, Heejin,Byeon, Song-Ho
, p. 7437 - 7445 (2015/07/20)
The effect of interlayer anions on the photoluminescence of layered rare earth hydroxides was investigated with the rare earth (RE)-doped layered gadolinium hydroxynitrate as a representative base matrix for efficient and stable anion-exchange reactions. Eu3+, Tb3+, and Ce3+ were employed as RE activator ions for red, green, and blue emissions, respectively. The excitation and emission behaviors of Gd1.80RE0.20(OH)5X·nH2O (LGdH:RE) were systematically compared for various interlayer inorganic and organic anions, where X = F-, Cl-, I-, OH-, ClO3-, S2-, CO32-, SO42-, terephthalate, 2-naphthoate, and dodecylsulfate members were obtained by the exchange reaction of corresponding X = NO3- members. Interestingly, a close relationship was found between the UV-Vis absorption spectra of aqueous solutions containing X anions and the excitation behavior of LGdH:RE. Thus, NO3-, I-, and S2- anions showing high absorbance in aqueous solution consistently shielded the excitation light for the 8S7/2 → 6IJ transition of Gd3+ and the 4f → 5d interconfigurational transitions of Tb3+ and Ce3+ to turn off the corresponding emissions from LGdH:Eu, LGdH:Tb, and LGdH:Ce. In contrast, the effect of terephthalate and 2-naphthoate, despite high absorbance in aqueous solutions, was significantly different depending on the RE activator ion. It is proposed that an identical interlayer anion in the gallery of LRHs can filter or sensitize the UV energy for excitation of RE3+-doped LRHs and its role (whether as a filter, a sensitizer, or just a spacer) is determined by the nature of activator ions.
