TY - JOUR
T1 - In-Situ Photochromism Switching with Crystal Jumping through the Deammoniation of N-Salicylideneaniline Ammonium Salt
AU - Sugiyama, Haruki
AU - Johmoto, Kohei
AU - Sekine, Akiko
AU - Uekusa, Hidehiro
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant Nos. JP17K05745 and JP18H04504, and by Keio Gijuku Academic Development Funds. The authors thank the referees for their valuable suggestions on the crystal structure analysis. The authors also thank the Suzukakedai Materials Analysis Division of the Technical Department at the Tokyo Institute of Technology for elemental analyses, TG-DTA-MS, and TG-DSC measurements.
Publisher Copyright:
Copyright © 2019 American Chemical Society.
PY - 2019/8/7
Y1 - 2019/8/7
N2 - N-Salicylideneaniline (SA) derivatives are traditional organic photochromic compounds whose properties are closely related to their molecular conformations and crystal structures. We herein present the photochromic property switching phenomenon of SA ammonium salt crystals using a deammoniation reaction. The N-salicylidene-4-carboxyaniline ammonium salt crystal (1-Sα) was found to exhibit photochromism upon irradiation with UV light. Upon heating, 1-Sα desorbed ammonia gas and transformed into a nonionic SA crystal (1-N) with non-photochromic properties. Surprisingly, this phase transition induced the "jumping crystal" phenomenon. Thus, the crystal structures both before and after the phase transition were determined, and it was revealed that the switching phenomenon of photochromism (photochromism switching) was caused by the crystal structural and molecular conformational changes that took place upon deammoniation. In addition, 1-N reverted to 1-Sα by exposure to aqua-ammonia vapor for a few minutes. These results suggested that such SA crystals could be applicable as switching materials or chemical sensors. ©
AB - N-Salicylideneaniline (SA) derivatives are traditional organic photochromic compounds whose properties are closely related to their molecular conformations and crystal structures. We herein present the photochromic property switching phenomenon of SA ammonium salt crystals using a deammoniation reaction. The N-salicylidene-4-carboxyaniline ammonium salt crystal (1-Sα) was found to exhibit photochromism upon irradiation with UV light. Upon heating, 1-Sα desorbed ammonia gas and transformed into a nonionic SA crystal (1-N) with non-photochromic properties. Surprisingly, this phase transition induced the "jumping crystal" phenomenon. Thus, the crystal structures both before and after the phase transition were determined, and it was revealed that the switching phenomenon of photochromism (photochromism switching) was caused by the crystal structural and molecular conformational changes that took place upon deammoniation. In addition, 1-N reverted to 1-Sα by exposure to aqua-ammonia vapor for a few minutes. These results suggested that such SA crystals could be applicable as switching materials or chemical sensors. ©
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U2 - 10.1021/acs.cgd.9b00039
DO - 10.1021/acs.cgd.9b00039
M3 - Article
AN - SCOPUS:85070920630
SN - 1528-7483
VL - 19
SP - 4324
EP - 4331
JO - Crystal Growth and Design
JF - Crystal Growth and Design
IS - 8
ER -