论文部分内容阅读
A series of salicylideneaniline derivatives la-1f were synthesized under mild condition in high yields,and characterized by ~1H NMR,HRMS,UV-vis and emission spectra.In solid and aprotic solvents 1a-lf exist mainly as E conformers that possess a sixmembered -ring hydrogen bond and undergo excited-state intramolecular proton transfer(ESIPT) reactions,resulting in a protontransfer tautomer emission.Depending on the electronic donor or acceptor strength of the substituent in either the HOMO or LUMO site,a broad tuning range of the emission from green(1c) to red(1a) has been achieved.
A series of salicylideneaniline derivatives la-1f were synthesized under mild conditions in high yields, and characterized by ~ 1H NMR, HRMS, UV-vis and emission spectra. In solid and aprotic solvents 1a-lf exist mainly as E conformers that possess a sixmembered -ring hydrogen bond and subjected excited-state intramolecular proton transfer (ESIPT) reactions, resulting in a proton transfer ns tautomer emission. Depending on the electronic donor or acceptor strength of the substituent in either the HOMO or LUMO site, a broad tuning range of the emission from green (1c) to red (1a) has been achieved.