Abstract
AbstractA study of stimuli-responsive molecules that can change their physical properties or external shape owing to variations in the external environment has attracted much attention owing to potential application in sensors and actuators. Our group has intensively studied aryl gold(I) isocyanide complexes to develop stimuli-responsive molecular crystals that can show luminescent mechanochromism and crystal jumping through phase transitions induced by mechanical stimulation or photoirradiation. Interestingly, some of our gold(I) isocyanide complexes have crystalline or even single crystalline characteristic both before and after mechano-induced emission color changes or photoinduced crystal jump. Based on the detailed information on molecular arrangements of the aryl gold(I) isocyanide complexes, the underlying mechanism of the responses can be clearly identified. In the Sect. 5.2 of this chapter, we review luminescent mechanochromic aryl gold(I) isocyanide complexes that has unique characteristic such as multiple emission colors, infrared emission, and noncentrosymmetry/centrosymmetry switching. Section 5.3 describes the mechano-induced single-crystal-to-single-crystal phase transitions of aryl gold(I) isocyanide complexes with red- and blue-shifted emission color changes or reversibility. In Sect. 5.4, the photoinduced phase transition of a gold(I) complex which accompanied by mechanical motion, i.e., crystal jump is described.
Publisher
Springer Nature Singapore