Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 2, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202110082
Keywords
hybrid salt; molecular dynamics; multistep reversible phase transitions; nonlinear optical switches
Categories
Funding
- NSFC [22071273, 21805312, 21821003]
- Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2017BT01C161]
- Graduate Innovation Fund of Sun Yat-Sen University [19lgyjs34]
Ask authors/readers for more resources
This study introduces a new organic-inorganic hybrid salt that exhibits a reversible three-step NLO switch with significant contrasts in SHG states within a temperature range. Through various analytical techniques, it is revealed that the multistep switching behavior is highly related to the molecular dynamics of the polar organic cations, demonstrating the potential of simple hybrid salts in designing new advanced multistep switching materials.
Switching materials in channels of nonlinear optics (NLOs) are of particular interest in NLO material science. Numerous crystalline NLO switches based on structural phase transition have emerged, but most of them reveal a single-step switch between two different second-harmonic-generation (SHG) states, and only very rare cases involve three or more SHG states. Herein, we report a new organic-inorganic hybrid salt, (Me3NNH2)(2)[CdI4], which is an unprecedented case of a reversible three-step NLO switch between SHG-silent, -medium, -low, and -high states, with high contrasts of 25.5/4.3/9.2 in a temperature range of 213-303 K. By using the combined techniques of variable-temperature X-ray single-crystal structural analyses, dielectric constants, solid-state C-13 nuclear magnetic resonance spectroscopy, and Hirshfeld surface analyses, we disclose that this four-state switchable SHG behavior is highly associated with the stepwise-changed molecular dynamics of the polar organic cations. This finding demonstrates well the complexity of molecular dynamics in simple hybrid salts and their potential in designing new advanced multistep switching materials.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available