Isotope effect on ultrafast charge-transfer-to-solvent reaction from I(-) to water in aqueous NaI solution

CORC > 武汉物理与数学研究所 > 中国科学院武汉物理与数学研究所 > 2011年以前论文发表（包括2011年）

	Isotope effect on ultrafast charge-transfer-to-solvent reaction from I(-) to water in aqueous NaI solution
	Suzuki,YI ; Shen,H ; Tang,Y ; Kurahashi,N ; Sekiguchi,K ; Mizuno,T ; Suzuki,T
刊名	CHEMICAL SCIENCE
	2011
卷号	2 期号:6
产权排序	第四
英文摘要	A charge-transfer-to-solvent (CTTS) reaction from a photoexcited iodine atomic anion, I- (aq), in bulk water (H2O and D2O) was studied by time-resolved photoelectron spectroscopy using a liquid beam (microjet) of aqueous NaI solution. The P-2(3/2) CTTS state of I- (aq) was excited by a 226 nm femtosecond laser pulse and the evolution of the nonstationary electronic state was probed using another ultraviolet femtosecond laser pulse. Global fitting of the observed time-dependent photoelectron kinetic energy distributions provided the time constants of individual reaction steps and the photoelectron spectra from the CTTS state, a contact pair, the solvent-separated state, and a hydrated electron. Most of the elementary reaction steps revealed a strong deuterium isotope effect, indicating coupling of the electron dynamics and the hydrogen atomic motion of solvent water. However, nondiffusive geminate recombination processes from the CTTS state and a contact pair were almost insensitive to deuteration. Consequently, geminate recombination processes from the CTTS state and a contact pair occurs more efficiently in D2O, because the response of water is decelerated in D2O. In contrast, the recombination process from the solvent-separated state in the final step of the CTTS reaction is less efficient in D2O, presumably due to the smaller zero point energy.
学科主题	化学
公开日期	2015-07-14
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/1884]
专题	武汉物理与数学研究所_2011年以前论文发表（包括2011年）
推荐引用方式 GB/T 7714	Suzuki,YI,Shen,H,Tang,Y,et al. Isotope effect on ultrafast charge-transfer-to-solvent reaction from I(-) to water in aqueous NaI solution[J]. CHEMICAL SCIENCE,2011,2(6).
APA	Suzuki,YI.,Shen,H.,Tang,Y.,Kurahashi,N.,Sekiguchi,K.,...&Suzuki,T.(2011).Isotope effect on ultrafast charge-transfer-to-solvent reaction from I(-) to water in aqueous NaI solution.CHEMICAL SCIENCE,2(6).
MLA	Suzuki,YI,et al."Isotope effect on ultrafast charge-transfer-to-solvent reaction from I(-) to water in aqueous NaI solution".CHEMICAL SCIENCE 2.6(2011).