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Synthesis and light absorption of benzotellurazole crown ether cyanine dye

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Chinese Journal of Chemistry 1995年第4期13卷 340-348页

作者： LUO, XH LIU, XF XU, HS WUHAN UNIV DEPT CHEMWUHAN 430072PEOPLES R CHINA

Various methods for synthesis of 2-methyl-5,6-(1,4, 7,10,13-pentaoxatridecamethylene)benzotellurazole (8) are described. Under different conditions, alkylation of compound 8 with methyl iodide gave telluronium salt 1,2-dimethyl-5,6-(1,4,7,10,13-pentaoxatridecamethylene)benzotellurazolium iodide (15) or quaternary ammonium salt 2,3-dimethyl-5,6-(1,4,7,10,13-pentaoxatridecamethylene)benzotellurazolium iodide (14) in high yields, repectively. The cyanine dye 3,3'-dimethyl-5,6,5',6'-bis(1,4,7,10,13-pentaoxatridecamethylene)telluracarbocyanine iodide (16) is obtained by condensation of 14 with ethyl orthoformate in acetic anhydride, The visible absorption of the cyanine dye is also discussed.

关键词： CROWN ETHER BENZOTELLURAZOLE cyanine dye SPECTRAL SENSITIZER SYNTHESIS

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DFT Investigation on the Trans-cis Photoisomerization of Pentamethine cyanine dye Model Molecule

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Chinese Journal of Structural Chemistry 2011年第3期30卷 401-411页

作者：王素凡周涛黄玉成叶世勇 College of Chemistry and Materials Science Anhui Normal University

The trans-cis photoisomerization of pentamethine cyanine dye （Cy5） has been theoretically investigated by the analysis on an analogical molecule model. All possible isomers have been searched by rotating the different bridge C-C bonds of the model. The relative stability of the isomers for the ground and first excited states as well as the corresponding excitation mechanism has been envisaged by DFT and time-dependent DFT method. The results show different conjugation degree of the isomers resulting in different absorption energy upon the different C-C bridge bond rotation. From the analyses of electronic density distribution of the frontier orbitals, it is predicted that there is charge transfer besides the π-π^＊ excitation for the cyanine dye model, which makes the mechanism and photo-properties different form those of other conjugated molecules.

关键词： photoisomerization excitation conjugation cyanine dye

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Investigation of a cyanine dye assay for the evaluation of the biocompatibility of magnesium alloys by direct and indirect methods

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Bioactive Materials 2020年第1期5卷 26-33页

作者： Afrah Al Hegy Ryan Smith Eric R.Gauthier Joy E.Gray-Munro Dept.of Chemistry and Biochemistry Laurentian UniversitySudburyOntarioP3E 2C6Canada

Magnesium and its alloys are promising candidates for a new generation of biodegradable metals in orthopaedic applications due to their excellent biocompatibility,biodegradability,and mechanical properties that are similar to natural ***,direct in vitro assessment of these materials in the presence of cells is complicated by degradation products from the alloy that lead to a false positive for the most commonly used cell adhesion and cell proliferation *** this paper,a cyanine dye was used to quantitatively evaluate the in vitro biocompatibility of a Mg AZ31 alloy by both direct and indirect *** cytotoxicity of the corrosion products was evaluated via an indirect method;a 25%decrease in cell viability compared to control samples was ***,direct assessment of cell adhesion and proliferation showed a statistically significant increase in cell number at the surface after 72 *** addition,the degradation rate and surface characteristics of the Mg AZ31 alloy were evaluated for both direct and indirect *** degradation rate was unaffected by the presence of cells while evidence of an increase in calcium phosphate deposition on the magnesium alloy surface in the presence of cells was *** study demonstrates that a cyanine dye based assay provides a more accurate assessment of the overall in vitro biocompatibility of biodegradable metals than the more commonly used assays reported in the literature to date.

关键词： Magnesium alloys Biocompatibility Direct method Indirect method cyanine dye Cell adhesion Cell proliferation Cytotoxicity

One-Pot Preparation of Highly Dispersed Second Near-Infrared J-Aggregate Nanoparticles Based on FD-1080 cyanine dye for Bioimaging and Biosensing

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CCS Chemistry 2022年第2期4卷 476-486页

作者： Caixia Sun Mengyao Zhao Xinyan Zhu Peng Pei Fan Zhang Department of Chemistry State Key Laboratory of Molecular Engineering of PolymersShanghai Key Laboratory of Molecular Catalysis and Innovative Materials and iChemFudan UniversityShanghai 200433

Bioimaging and biosensing in the second nearinfrared(NIR-II)window have attracted great attention due to their unprecedented high temporal–spatial resolution,sensitivity,and penetration *** some organic fluorescence dyes have been developed in this window,it is still a great challenge to synthesize hydrophilic organic contrast agents with both absorbance and emission wavelengths beyond 1300 nm.J-aggregation is a facile pathway to achieve the wavelength red-shift of organic dyes to the NIR-II window and simultaneously improve their ***,we report FD-1080 J-aggregates(FD-J)with absorbance of 1360 nm and emission of 1370 nm through heating H-aggregated FD-1080 cyanine dyes in an aqueous *** FD-J administration,real-time imaging of mice brain and hindlimb vasculatures can be performed beyond 1500 ***,arterial and venous vessels can be clearly distinguished through dynamic imaging after injection of *** addition,reactive oxygen species-responsive NIR-II ratiometric fluorescence sensors were available based on FD-J and lanthanide nanoparticles to enable the detection of inflammation in living mice.

关键词： NIR-II J-aggregates cyanine dye heatinginduced transformation bioimaging biosensing

Optimizing Film Design and Application forthe Recordable Compact Disk Developedby Two cyanine dye Samples

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Chinese Journal of Lasers 1999年第4期 3-5页

作者： LI Jing and GAN Fuxi (Shanghai Institute of Optics and Fine Mechanics, The Chinese Academy of Sciences, Shanghai 201800, China) Received March 4, 1999 Revised manuscript received Apr. 12, 1999

The optical constants of two cyanine dye films we prepared have been measured by a RAP 1 typed spectroscopic ellipsometer. On the basis of making a simplified model for the wafers of a recordable compact disk (CD R), the optimizing designs for them developed by the cyanine dye films are given. In addition, the dynamic storage performances of two sample disks have been tested by our dynamic storage testing system. Measurement results of the sample disks are obtained to test our film designs.

关键词： cyanine dye ellipsometer CD R film design dynamic storage performance

Thermal and Optical Properties of cyanine dye for High Density Digital Versatile Disc-Recordable (DVD-R)

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Chinese Journal of Lasers 2000年第4期 62-68页

作者： DONG Xuying GAN Fuxi GU Donghong YIN Jinlong (Shanghai Institute of Optics and Fine Mechanics, The Chinese Academy of Sciences, Shanghai 201800, China)

A new cyanine thin film has been prepared for high density digital versatile disc recordable (DVD R) by means of a spin coating process. The effects of the optical and thermal properties of the cyanine dye on recording characteristics have been studied. Rapid decomposition of the cyanine dye in a narrow temperature range, which is critical to the clear mark edges, is shown in this paper. A steep absorption edge at the 635 nm is crucial to high reflectivity. The optical recording performance of the cyanine dye thin film shows that high reflectivity contrast (48%) can be obtained at low writing power and narrow writing pulse width using He Ne laser (632.8 nm) irradiation. The carrier to noise ratio (CNR) of the single layer disk is greater than 40 dB at travelling rate of 2.4 m/s.

关键词： DVD R disc high density cyanine dye thermo gravimetric analyses (TG)

A cyanine-based Liposomal Nanophotosensitizer for Enhanced Cancer Chemo-Photodynamic Therapy

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Chemical Research in Chinese Universities 2021年第4期37卷 925-933页

作者： LI Mengqi MA He SHI Chao ZHANG Han LONG Saran SUN Wen DU Jianjun FAN Jiangli PENG Xiaojun State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian116024P.R.China State Key Laboratory of Fine Chemicals Shenzhen Research InstituteDalian University of TechnologyShenzhen518057P.R.China

Currently,chemotherapy is one of the most important treatment modalities for malignant tumors in the clinic,however,it exhibits some shortcomings,such as poor selectivity,limited efficacy and serious adverse ***,synergistic therapy and accurate drug delivery at tumor sites become a promising strategy for achieving tumor ***,a smart NIR fluorescence imaging-guided nanoliposome was fabricated by encapsulating a chemotherapeutic drug(doxorubicin,DOX),liposomes(L)and a near-infrared(NIR)photosensitizer(CY)to form L@CY@DOX,which could realize enhanced therapeutic efficacy of chemo-PDT in cancer therapy(PDT=photodynamic therapy).L@CY@DOX can induce mitochondrial apoptosis and produce severe toxicity at the cellular level,and L@CY@DOX can enrich in the tumor site,which significantly induces tumor *** vitro and in vivo studies demonstrated that L@CY@DOX exhibited great antitumor efficacy compared with each one of these monotherapies,indicating that the combination of chemotherapy and PDT possessed potential development prospects and is anticipated in clinical application.

关键词： Photodynamic therapy Liposome Photosensitizer cyanine dye Doxorubicin Cancer

Anisotropy in Third-Order Nonlinear Optical Susceptibility of a Squarylium dye in a Nematic Liquid Crystal

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Chinese Physics Letters 2006年第3期23卷 635-638页

作者：金朝辉李忠正 KASATANI Kazuo OKAMOTO Hiroaki Department of Advanced Materials Science and Engineering Faculty of Engineering Yamaguchi University Tokiwadai Ube 755-8611 Japan

A squarylium dye is dissolved in 4-cyano-4＇-pentylbiphenyl （SCB） and oriented by sandwiching mixtures between two pieces of rubbed glass plates. The optical absorption spectra of the oriented squarylium dye-5CB layers exhibit high anisotropy. The third-order nonlinear optical responses and susceptibilities X^（3）e of squarylium dye in 5CB are measured with light polarizations parallel and perpendicular to the orientational direction by the resonant femtosecond degenerate four-wave mixing （DFWM） technique. Temporal profiles of the DFWM signal of the oriented squarylium dye-5CB layers with light polarizations parallel and perpendicular to the orientational direction are measured with a time resolution of 0.3ps （FWHM）, and are found to consist of two components, i.e., the coherent instantaneous nonlinear response and slow response due to the formation of excited molecules. A high anisotropic ratio of x^（3）e, 10.8 ：k 1.2, is observed for the oriented layers.

关键词： MULTIPLE FLUORESCENCE EMISSION DOPED POLYMER SYSTEMS SQUARAINE dye UNSYMMETRICAL SQUARAINES EXCITED-STATES cyanine dye FILMS ABSORPTION CHEMISTRY ORIGIN

Progress in modifications and applications of fluorescent dye probe

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Progress in Natural Science:Materials International 2009年第1期19卷 1-7页

作者： Xuening Fei,Yingchun Gu Department of Material Science and Engineering,Tianjin Institute of Urban Construction,Tianjin 300384,China [a]Department of Material Science and Engineering Tianjin Institute of Urban Construction Tianjin 300384 China

This review summarizes the labeling technology and applications of fluorescent dye probe in biology,especially the characteristics,modification and applications of cyanine *** on the currently available modification methods of fluorescent dye probe,we discuss the studies of enhancing the water-solubility,improving the degree of biocompatibility and target-labeling,increasing the sensitivity and decreasing the toxicity of fluorescent *** also give a brief introduction on the modification method,that the fluorescent dye is directly introduced onto the cell surfaces by amine derivatives or azides to intensify the transferring information of aberrant *** suggest that fluorescent dye modified with chitosan oligosaccharide can obviously increase the degree of biocompatibility and target-labeling,and decrease the degree of toxicity.

关键词： Fluorescent dye probe cyanine dye Chitosan oligosaccharide Modification