title: Facile synthesis and photo-physical properties of cyano-substituted styryl derivatives based on carbazole/phenothiazine.
abstract: Four new cyano-substituted styryl derivatives based on carbazole and phenothiazine were facilely synthesized by conventional Knoevenagel condensation and well characterized. The UV-vis spectra of these dyes showed the lowest-energy absorption bands were mainly caused by the HOMO-LUMO one-electron promotion as conformed by TD-DFT calculations. The thermogravimetric analysis showed these dyes were thermally stable up to 350 °C. The UV-vis absorption and fluorescence emission spectra were also studied in solvents of different polarity, these dyes exhibited unusual large Stokes shift.
authors.affiliation: School of Petrochemical Engineering, Changzhou University, Changzhou 213164, PR China.
authors.forename: Mingzhu
authors.initials: M
authors.lastname: Lu
authors.forename: Yulan
authors.initials: Y
authors.lastname: Zhu
authors.forename: Kuirong
authors.initials: K
authors.lastname: Ma
authors.forename: Li
authors.initials: L
authors.lastname: Cao
authors.forename: Kun
authors.initials: K
authors.lastname: Wang
mesh_terms: D000042:Absorption; D002227:Carbazoles / Q000138:chemical synthesis* / Q000737:chemistry*; D004583:Electrons; D008027:Light; D008958:Models, Molecular; D009570:Nitriles / Q000737:chemistry*; D010640:Phenothiazines / Q000138:chemical synthesis* / Q000737:chemistry*; D011789:Quantum Theory; D012997:Solvents / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D020058:Styrene / Q000737:chemistry*; D013818:Thermogravimetry
chemical_list: D002227:Carbazoles; D009570:Nitriles; D010640:Phenothiazines; D012997:Solvents; C041514:carbazole; D020058:Styrene; C031637:phenothiazine