HAN Cai-qin, DUAN Pei-tong, WU Bin, LIU Ying, LUO Xiao-sen, NI Xiao-wu. Fluorescence Polarization and Time Resolved Characteristics of Isopropanol-water Mixture[J]. Chinese Journal of Luminescence, 2011,32(12): 1303-1307
HAN Cai-qin, DUAN Pei-tong, WU Bin, LIU Ying, LUO Xiao-sen, NI Xiao-wu. Fluorescence Polarization and Time Resolved Characteristics of Isopropanol-water Mixture[J]. Chinese Journal of Luminescence, 2011,32(12): 1303-1307DOI:
Fluorescence Polarization and Time Resolved Characteristics of Isopropanol-water Mixture
The polarization fluorescence spectra of isopropanol-water mixture excited by ultraviolet light was studied experimentally. The decay process of fluorescence intensity was detected at different center emission peaks. The curve was fitted by an exponential function and the processing data was obtained by deconvolution. Both the polarization degree and fluorescence lifetime were calculated
and mathematical characterization was performed for the fluorescence counts decay curves. The fluorescence emission and polarization characteristics were discussed. It is found that the isopropanol-water mixture excited by ultraviolet light obtains partially polarized fluorescence with certain molecular orientation. The polarization degree and anisotropy degree are 0.542 and 0.441
respectively. Induced by exciting light with wavelengths of 220 nm and 232 nm
the fluorescence lifetime of isopropanol-water mixture at peaks of 277
284
293
309 nm is about 17 ns. While the average fluorescence lifetime at peaks of 328 nm
345 nm and 362 nm is around 21
22
16 ns
respectively. It is related with the molecular cluster structure relative stability of isopropanol-water mixture by the action of hydrogen bond. The research will contribute to the study of the molecular characteristic of isopropanol-water cluster.
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Smyk B, Amarowicz R, Szabelski M, et al. Steady-state and time-resolved fluorescence studies of stripped borage oil [J]. Analytica Chimica Acta, 2009, 646 (7):85-89.[2] Liu B S, Xue C L, Wang J, et al. Studies on the interaction between ciprofloxacin and ofloxacin in presence of bovine serum albumin by spectroscopic methods [J]. Chin. J. Lumin. (发光学报), 2010, 31 (2):285-290 (in Chinese).[3] Nevin A, Comelli D, Valentini G, et al. Time-resolved fluorescence spectroscopy and imaging of proteinaceous binders used in paintings [J]. Anal Bioanal Chem, 2007, 388 (8):1897-1905.[4] Gao X X, Mou J, Wang W J, et al. Influence of UV illumination on fluorescence spectrum properties of azobenzen [J]. Chin. J. Lumin. (发光学报), 2009, 30 (4):549-553 (in Chinese).[5] Pei L S, Zhang J, Kong W, et al. Polarization spectroscopy of aluminum phthalocyanine hydroxide embedded in superfluid helium droplets [J]. Chem. Phys. Lett., 2008, 462 (6):173-177.[6] Levitt A J, Matthews R D, Ameer-Beg M S, et al. Fluorescence lifetime and polarization-resolved imaging in cell biology[J]. Current Opinion in Biotechnology, 2009, 20 (1):28-36.[7] Pu Y, Wang W B, Achilefu S, et al. Time-resolved fluorescence polarization anisotropy and optical imaging of cybesin in cancerous and normal prostate tissues [J]. Optics Communications, 2007, 274 (1):260-267.[8] Xu J G, Wang Z B. Method of Fluorescence Analysis (Third Edition) (荧光分析法 第三版) [M]. Beijing: Science Press, 2006, 184:162-167 (in Chinese).[9] Mandal A, Prakash M, Kumar R M, et al. Ab initio and DFT studies on methanol water clusters [J]. J. Phys. Chem. A, 2010, 114 (6):2250-2258.[10] Alavi S, Takeya S, Ohmura R, et al. Hydrogen-bonding alcohol-water interactions in binary ethanol, 1-propanol, and 2-propanol+methane structure II clathrate hydrates [J]. J. Chem. Phys., 2010, 133 (7):074505-1-6.[11] Xu H, Zhu T, Yu R P. Study on the absorption and fluorescence spectra of ethylene glycol and glycerol [J]. Spectroscopy and Spectral Analysis (光谱学与光谱分析), 2007, 27 (7):1381-1384 (in Chinese).[12] Razavi S, Sabetghadam A, Mohammadi T. Dehydration of isopropanol by PVA-APTEOS/TEOS nanocomposite membranes [J]. Chemical Engineering Research and Design, 2011, 89 (2):148-155.[13] Han C Q, Duan P T, Wu B, et al. Research on cluster characteristics of isopropanol-water complex by derivative fluorometry [J]. J. Optoelectronics Laser(光电子激光), 2010, 21 (7):1097-1101 (in Chinese).[14] Herzberg G. Molecular Spectroscopy and Molecular StructureⅡ: Infrared Spectrum and Raman Spectrum of Polyatomic Molecule (分子光谱与分子结构Ⅱ: 多原子分子的红外光谱与喇曼光谱) [M]. Beijing: Science Press, 1986:230 (in Chinese).