writer：Gang Qian, Zhi Yuan Wang*
keywords：Thermochromism,
source：期刊
specific source：Adv. Mater., 2012, 24: 1582–1588
Issue time：2012年
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.