The real-time second harmonic generation was employed to investigate the[2＋2]photodimerization of styrylquinoline（SQ） derivatives in Langmuir-Blodgett（LB） monolayers deposited from aqueous subphases with differen...The real-time second harmonic generation was employed to investigate the[2＋2]photodimerization of styrylquinoline（SQ） derivatives in Langmuir-Blodgett（LB） monolayers deposited from aqueous subphases with different acidity.It was discovered that the photodimerization rate constant significantly decreased upon the addition of acid.The additional atomic force microscopy measurements revealed that surface morphologies were correlated to the photodimerization kinetics.These experimental results provide direct evidence for the topo-chemical mechanisms of[2＋2]photodimerization in LB films.The current study demonstrates that the intermolecular interactions and aggregation structures play important roles in the photochemical properties at surfaces.展开更多
A method of preparation of stable, homogeneous and controlled thickness TiO2 film through hydrolysis of Ti(OC4H9)4 is introduced in detail. The structure and property of the film have been investigated by means of SEM...A method of preparation of stable, homogeneous and controlled thickness TiO2 film through hydrolysis of Ti(OC4H9)4 is introduced in detail. The structure and property of the film have been investigated by means of SEM and FT-IR techniques. The strong quenching effect between sensitizing dyes and TiO2 film is observed in their fluorescence spectra.展开更多
基金supported by the National Natural Science Foundation of China(Nos.21473217,21227802 and 21303216)the Chinese Ministry of Science and Technology(No.2013CB834504)
文摘The real-time second harmonic generation was employed to investigate the[2＋2]photodimerization of styrylquinoline（SQ） derivatives in Langmuir-Blodgett（LB） monolayers deposited from aqueous subphases with different acidity.It was discovered that the photodimerization rate constant significantly decreased upon the addition of acid.The additional atomic force microscopy measurements revealed that surface morphologies were correlated to the photodimerization kinetics.These experimental results provide direct evidence for the topo-chemical mechanisms of[2＋2]photodimerization in LB films.The current study demonstrates that the intermolecular interactions and aggregation structures play important roles in the photochemical properties at surfaces.
基金supported by the National Natural Science Foundation of China (21173135)Specialized Research Fund for the Doctoral Program of Higher Education of China (20110131130008)+1 种基金Taishan Scholar Foundation of Shandong Province, China (ts20070713)Graduate Independent Innovation Foundation of Shandong University, China (yzc10112)~~
文摘A method of preparation of stable, homogeneous and controlled thickness TiO2 film through hydrolysis of Ti(OC4H9)4 is introduced in detail. The structure and property of the film have been investigated by means of SEM and FT-IR techniques. The strong quenching effect between sensitizing dyes and TiO2 film is observed in their fluorescence spectra.
