title: Synthesis of coumarin/phenanthridine-fused heterocycles and their photochemical and thermochromic properties.
abstract: Four coumarin and phenanthridine-fused heterocycles were efficiently synthesized using base-mediated annulation of N-alkylquinolinium iodide and coumarin as a key step. One compound is found to be sensitive to light and changes color upon UV irradiation; the others are sensitive to heat and possess negative thermochromic properties. A novel light- and heat-sensitive molecular skeleton is introduced.
authors.affiliation: Department of Chemistry, Tunghai University, No. 181, Section 3, Taichung Port Road, Taichung City 40704, Taiwan, Republic of China.
authors.forename: Jiun-Jia
authors.initials: JJ
authors.lastname: Chen
authors.forename: Kuan-Ting
authors.initials: KT
authors.lastname: Li
authors.forename: Ding-Yah
authors.initials: DY
authors.lastname: Yang
mesh_terms: D003374:Coumarins / Q000737:chemistry*; D006571:Heterocyclic Compounds / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D010617:Phenanthridines / Q000737:chemistry*; D055668:Photochemical Processes; D013816:Thermodynamics
chemical_list: D003374:Coumarins; D006571:Heterocyclic Compounds; D010617:Phenanthridines; C030123:coumarin