Azulene-containing organic chromophores with tunable near-IR absorption in the range of 0.6 to 1.7 mu m

作者:Wang Fuke*; Lin Ting Ting; He Chaobin; Chi Hong; Tang Tao; Lai Yee Hing
来源:Journal of Materials Chemistry, 2012, 22(21): 10448-10451.
DOI:10.1039/c2jm31098h

摘要

Near-infrared (NIR) absorption in the range of 0.75-2.5 mm is in great demand for a variety of applications but currently the majority of commercial NIR devices are based on inorganic materials due to the limited number of organic materials that are active in this range. Here we present the preparation and optical studies of a new series of stable azulene-containing NIR chromophores whose absorption can be tuned in the range of 0.6-1.7 mu m. DFT calculation revealed that the protonation-induced low excitation gap was attributable to the substantial intramolecular charge transfer.