caa a22 4500 463226542 CHVBK 20180405153228.0 cr unu---uuuuu 170326e20070901xx s 000 0 eng 10.1007/s10853-007-1650-6 doi (NATIONALLICENCE)springer-10.1007/s10853-007-1650-6 Photochemical behaviors during the photosensitization of colloidal TiO2 particles by a newly synthesized multidentate squaraine [Elektronische Daten] [Mingzhe Wang, Hong Xie, Jianqiang Zhu, Minggui Xie, Tiankai Li, Ying Li] A new squaraine dye Bis(4-N,N-dicarboxymethyl-2-hydroxyphenyl)squaraine (SQ) which could be used as organic photovoltaic materials, was synthesized, and its molecular structure was fully characterized by elemental analysis, IR, 1H NMR and MS. SQ exhibits strong absorption band over 600-700nm. Addition of TiO2 colloids to the ethanol solution of SQ resulted in the increase of optical density, quenching of fluorescence and shortened fluorescence lifetime. The apparent association constant between the sensitizer and semiconductor as measured from the fluorescence quenching data, was 2427M−1. Fluorescence lifetime measurements gave the rate constant for the electron injection process from the excited singlet of SQ to the conduction band of TiO2 nanoparticles as 2.55×108s−1. In addition, SQ doped SiO2 gel glass slices were prepared and characterized by absorption and emission spectra. Springer Science+Business Media, LLC, 2007 Wang Mingzhe College of Chemistry, Sichuan University, 610064, Chengdu, China aut Xie Hong College of Chemistry, Sichuan University, 610064, Chengdu, China aut Zhu Jianqiang College of Chemistry, Sichuan University, 610064, Chengdu, China aut Xie Minggui College of Chemistry, Sichuan University, 610064, Chengdu, China aut Li Tiankai Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 100101, Beijing, China aut Li Ying College of Chemistry, Sichuan University, 610064, Chengdu, China aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/18(2007-09-01), 7678-7683 0022-2461 42:18<7678 2007 42 10853 https://doi.org/10.1007/s10853-007-1650-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1650-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wang Mingzhe College of Chemistry, Sichuan University, 610064, Chengdu, China aut NATIONALLICENCE 700 1- Xie Hong College of Chemistry, Sichuan University, 610064, Chengdu, China aut NATIONALLICENCE 700 1- Zhu Jianqiang College of Chemistry, Sichuan University, 610064, Chengdu, China aut NATIONALLICENCE 700 1- Xie Minggui College of Chemistry, Sichuan University, 610064, Chengdu, China aut NATIONALLICENCE 700 1- Li Tiankai Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 100101, Beijing, China aut NATIONALLICENCE 700 1- Li Ying College of Chemistry, Sichuan University, 610064, Chengdu, China aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/18(2007-09-01), 7678-7683 0022-2461 42:18<7678 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer