84100-84-5Relevant articles and documents
Substituent effect in direct ring functionalized squaraine dyes on near infra-red sensitization of nanocrystalline TiO2 for molecular photovoltaics
Pandey, Shyam S.,Inoue, Takafumi,Fujikawa, Naotaka,Yamaguchi, Yoshihiro,Hayase, Shuji
, p. 269 - 275 (2010)
We have synthesized a series of novel blue colored symmetrical squaraine sensitizers with variable alkyl chain length for their application towards the fabrication of dye-sensitized solar cells (DSSCs). It has been found that an increase in the alkyl chain length substituted at N-position of indole ring exhibits enhanced electron diffusion length and electron life-time resulting in better passivation of nanocrystalline TiO2 surface leading to enhancement in the cell performance. Based on HOMO and LUMO energy measurement of squaraine dyes, it has been demonstrated that about 0.16 eV energy barrier is sufficient for electron injection from LUMO of dye to TiO2 conduction band and dye regeneration after photo-excitation. Performances of DSSCs using model squaraine dyes indicate that dodecyl alkyl substituent is optimum giving highest Voc and use of chenodeoxycholic acid along with the dye SQ-4 shows a photoconversion efficiency of 3.5% under AM 1.5 irradiation.
A ratiometric fluorescent sensor for pH fluctuation and its application in living cells with low dark toxicity
Shi, Bingjie,Gao, Yilin,Liu, Chunxia,Feng, Wei,Li, Zhanxian,Wei, Liuhe,Yu, Mingming
, p. 522 - 528 (2017)
It is highly demanded and challenging to develop small-molecular fluorescent sensors for the ratiometric detection of pH fluctuation. A ratiometric fluorescent pH sensor was constructed by integrating a pH-sensitive fluorophore with a pH-insensitive hemicyanine group. Its linear and reversible ratiometric fluorescent response from pH 7.0 to 8.8 and 6.0 to 9.0 respectively makes this sensor suitable for the practical tracking of pH fluctuation in live cells. With this sensor, stimulated pH fluctuation has been successfully tracked in a ratiometric manner via fluorescence imaging with low dark toxicity.
A novel colorimetric and fluorescent probe based on indolium salt for detection of cyanide in 100% aqueous solution
Li, Junjian,Chang, Zengyan,Pan, Xihao,Dong, Wei,Jia, Ai-Qun
, p. 175 - 179 (2019)
We reported a novel indolium salt -based colorimetric and fluorescent probe N1 for cyanide. The probe N1 showed a bleaching solution and fluorescence quenching toward CN? in 100% aqueous solution over other anions. In UV-vis and fluorescent spectrometry method, a large blue shift (261 nm), color bleaching and fluorescence quenching was observed. The minimum detection limit on fluorescence response of the probe N1 towards CN? was 3.34 × 10?7 mol/L. This probe N1 operates via intramolecular charge transfer (ICT) mechanism, because the nucleophilic attacking of CN? to the indol C[dbnd]N, the ICT progress was blocked with color changed and fluorescence quenched, which is further confirmed by 1H NMR, MS and DFT studies. Therefore, the synthesized probe would be a promising device for the detection of cyanide.
A coumarin-connected carboxylic indolinium sensor for cyanide detection in absolute aqueous medium and its application in biological cell imaging
Cheng, Siyao,Pan, Xihao,Shi, Mingyang,Su, Ting,Zhang, Cheng,Zhao, Wei,Dong, Wei
, (2020)
Fluorescent sensor has been noticed in detecting system due to its sensitive, selective, operational simplicity and low cost. We designed a coumarin-connected carboxylic indolium sensor molecule that is water-soluble and cytomembrane-permeable. This infrared (IR) emitter is selectively sensitive towards cyanide detection in aqueous media according to CN? nucleophilic attack on the indole C=N function. Upon the addition of CN? anion, the color of sensor in water varied from blue to colorless by naked eyes and fluorescence quenching was observed by spectroscopic method. This was because the intramolecular charge transfer (ICT) effect occurred when the fluorescent sensor was added with CN?. The minimum detection limit of the sensor's fluorescence response to CN? is 4.44 × 10?7 mol/L. Furthermore, the cytotoxicity test shows the sensor has lower cytotoxicity, and indicates that this sensor can be utilized for practical detection of trace cyanide in wastewater.
Visible Light Stimulated Bistable Photo-Switching in Defect Engineered Metal-Organic Frameworks
Shepherd, Nicholas D.,Wang, Tiesheng,Ding, Bowen,Beves, Jonathon E.,D'Alessandro, Deanna M.
supporting information, p. 11706 - 11710 (2021/05/04)
The incorporation of photoactive donor-acceptor Stenhouse adduct (DASA) moieties into Metal-Organic Frameworks (MOFs) provides a new route to the development of visible light switching materials. Herein, a DUT-5 mixed-linker defect series was exploited to produce a derivative group of DASA-modified materials via postsynthetic modification (PSM). The photoactive MOFs exhibited conversion stimulated by visible wavelengths and were stable following multiple cycles. Thermodynamic and metastable states persisted over an extended time period.
NIR/PET bimodal contrast agent, and preparation method and application thereof
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Paragraph 0135-0138; 0141-0142; 0176-0179, (2021/07/24)
The invention discloses a near infrared and positron emission computed tomography (NIR)/positron emission tomography (PET) bimodal contrast agent, and a preparation method and application thereof. The NIR/PET bimodal contrast agent is obtained by taking an optimized indocyanine green derivative as a carrier and connecting a PET signal molecule. The contrast agent can be used for near-infrared imaging and has PET imaging capability; and meanwhile, the contrast agent is good in water solubility and low in toxicity, near-infrared and PET images verify each other, diagnosis information is enriched, and the contrast agent has the potential of becoming a novel tumor contrast agent.
