title: Near-infrared thermochromic diazapentalene dyes.
abstract: A series of 2,5-diazapentalene containing dyes with tunable energy gaps are visible and near-infrared halochromic towards various acids and their protonated counterparts represent a new class of thermochromic materials with the near-infrared absorption being switched on at room temperature and off above 50 °C.
authors.affiliation: Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada.
authors.forename: Gang
authors.initials: G
authors.lastname: Qian
authors.forename: Zhi Yuan
authors.initials: ZY
authors.lastname: Wang
mesh_terms: D001372:Aza Compounds / Q000737:chemistry*; D003116:Color; D004396:Coloring Agents / Q000737:chemistry*; D003517:Cyclopentanes / Q000737:chemistry*; D004563:Electrochemistry; D007259:Infrared Rays; D055620:Optical Phenomena; D013696:Temperature
chemical_list: D001372:Aza Compounds; D004396:Coloring Agents; D003517:Cyclopentanes; C024646:pentalenene