The energies of low-lying singlet excited states of oligothiophenes, xT's (x = 3 to 8), and polythiophene are determined using femtosecond time-resolved near-infrared spectroscopy. The energies are linearly correlated with the reciprocal number of...
Ashok Zachariah Samuel   Sohshi Yabumoto   Kenichi Kawamura   Koichi Iwata   
ANALYST 140(6) 1847-1851 2015年 [査読有り]
Raman imaging is one of the very informative methods for the characterization of chemically and structurally heterogeneous materials without employing specific molecular labels. Multifocus Raman imaging is one of the fast-imaging alternatives to t...
JOURNAL OF PHYSICAL CHEMISTRY B 118(29) 8631-8641 2014年7月 [査読有り]
A number of biochemical reactions proceed inside biomembranes. Because the rate of a chemical reaction is influenced by chemical properties of the reaction field, it is important to examine the chemical properties inside the biomembranes, or lipid...
JOURNAL OF PHYSICAL CHEMISTRY A 118(23) 4071-4078 2014年6月 [査読有り]
Carotenoids have two major low-lying excited states, the second lowest (S-2 (1B(u)(+))) and the lowest (S-1 (2A(g)(-))) excited singlet states, both of which are suggested to be involved in the energy transfer processes in light-harvesting complex...
JOURNAL OF RAMAN SPECTROSCOPY 39(11) 1512-1517 2008年11月 [査読有り]
Ultrafast bimolecular radical reaction proceeds between photoexcited p-terphenyl and carbon tetrachloride. The lifetime of the first excited singlet (Si) state of p-terphenyl in carbon tetrachloride measured with picosecond time-resolved fluoresce...
Viscosity inside the lipid bilayer of egg-PC (egg yolk phosphatidylcholine) liposome with a diameter of 100 nm is examined with picosecond time-resolved fluorescence spectroscopy. The viscosity is estimated independently from the photoisomerizatio...
JOURNAL OF PHYSICAL CHEMISTRY B 115(13) 3339-3343 2011年4月
The interaction of phenol guest molecules with 2-methylresorcinarene and its methylene-bridged cavitand derivative has been investigated in methanol. The host molecules were selected according to the flexibility of their cavities by varying the co...
JOURNAL OF PHYSICAL CHEMISTRY A 114(22) 6351-6355 2010年6月
Transient absorption spectra of 9,9'-bianthryl (BA) in heptane, in acetonitrile, and in 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (bmimTf(2)N) are observed with a nanosecond time-resolved near-IR absorption spectrometer for the...
The formation of the solvatation shell of anthracene molecule was investigated in binary mixtures of protic alcoholic solvents by solvent-relaxation measurements, anisotropy decay studies and quantum-chemical modeling. Results show significant cha...
JOURNAL OF PHYSICAL CHEMISTRY A 113(6) 1007-1011 2009年2月
The rate of vibrational energy relaxation (VER) is a valuable probe of microscopic intermolecular interaction. In the present article, the VER rate of the T-1u CO stretch of W(CO)(6) is measured in binary solutions composed of ail alkane (hexane, ...
2013 Korea - Japan Symposium on Frontier Photoscience (KJFP-2013), Invited Lecture 50, Hoam Faculty House, Seoul National University, Seoul , Korea 2013年