文献类型：期刊文献

中文题名：Promising Ultraviolet Absorbers——Novel Guanine Analogs Having Significantly Improved Ultraviolet Absorption Capacity and Dissipating the Energy of Absorbed Photons by Nonradiative Decay Mechanism

英文题名：Promising Ultraviolet Absorbers-Novel Guanine Analogs Having Significantly Improved Ultraviolet Absorption Capacity and Dissipating the Energy of Absorbed Photons by Nonradiative Decay Mechanism

作者：Han Song-zhe[1];Wu Yu-ting[1];Zhang Meng[1];Jiao Jia-jun[1]

机构：[1]E China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2012

卷号：28

期号：3

起止页码：434

中文期刊名：Chemical Research in Chinese Universities

外文期刊名：CHEMICAL RESEARCH IN CHINESE UNIVERSITIES

收录：CSTPCD;;Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000305315100018)】；CSCD:【CSCD2011_2012】；

基金：Supported by the Foundation for University Key Teachers from the Ministry of Education of China(No.0024951).

语种：英文

中文关键词：Guanine; Ultraviolet absorber; Acidamide

外文关键词：Guanine; Ultraviolet absorber; Acidamide

摘要：Structural properties of nucleobase underlie their ultrafast excited-state dynamics and low fluorescence quantum yields, which cause effectively nonradiative decay process and render them like sunscreens. Thus, eight guanine analogs[N-2-（2＇-nitrobenzoyl）-guanine, N-2-（3＇-nitrohenzoyl）-guanine, N-2-（4＇-nitrobenzoyl）-guanine, N-2-（2＇-hydroxybenzoyl）-guanine, N-2-（4＇-methoxylbenzoyl）-guanine, N-2-（4＇-chloricbenzoyl）-guanine, N-2-（4＇- me- thylicbenzoyl）-guanine and N-2-（3＇,5＇-dinitrobenzoyl）-guanine] with different substituted benzoyls, except N-2-（4＇-chloricbenzoyl）-guanine, were newly synthesized. In contrast with guanine, they exhibit wider ultraviolet absorbent range, higher molar extinction coefficient and lower fluorescence intensity.
Structural properties of nucleobase underlie their ultrafast excited-state dynamics and low fluorescence quantum yields, which cause effectively nonradiative decay process and render them like sunscreens. Thus, eight guanine analogs [N-2-(2'-n itrobenzoyl)-guanine, N-2-(3'-nitrobenzoyl)-guanine, N-2-(4'-nitrobenzoyl)-guanine, N-2-(2'-hydroxybenzoyl)-guanine, N-2-(4'-methoxylbenzoyl)-guanine, N-2-(4'-chloricbenzoyl)-guanine, N-2-(4'- methylicbenzoyl)-guanine and N-2-(3',5'-dinitrobenzoyl)-guanine] with different substituted benzoyls, except N-2-(4'-chloricbenzoyl)-guanine, were newly synthesized. In contrast with guanine, they exhibit wider ultraviolet absorbent range, higher molar extinction coefficient and lower fluorescence intensity.