Original scientific paper

https://doi.org/10.5562/cca2492

Photomechanical and Photochromic Behavior of a Molecule Containing Multiple Photoactive Groups

Manas K. Panda ; New York University Abu Dhabi, PO Box 129188, Abu Dhabi, United Arab Emirates
Nada ElAzhary ; New York University Abu Dhabi, PO Box 129188, Abu Dhabi, United Arab Emirates
Mouza A. Alzaabi ; Abu Dhabi University, PO Box 59911, Abu Dhabi, United Arab Emirates
Brandon M. Wahba ; New York University Abu Dhabi, PO Box 129188, Abu Dhabi, United Arab Emirates
Jolly Jacob ; Abu Dhabi University, PO Box 59911, Abu Dhabi, United Arab Emirates
Panče Naumov ; New York University Abu Dhabi, PO Box 129188, Abu Dhabi, United Arab Emirates

Abstract

Photomechanical and photochromic activities are reported for single crystals of a new multirespon-sive material, 2,4-di-tert-butyl-6-((E)-((4-((E)-phenyldiazenyl)phenyl)imino)methyl)phenol (Azim-1), with two photoactive groups that can undergo photoisomerization (azo and imine), and an ortho-hydroxy group that is capable of proton transfer. Upon irradiation with UV light, platy and needle-shaped crystals of Azim-1 rapidly bend towards the light source and return to their initial shape as soon as the irradiation is terminated. Upon prolonged exposure to UV light, the crystals change their color from yellow to red. The crystal structure of non-irradiated Azim-1 is reported, and the mecha-nisms of the photomechanical and photochromic responses are discussed.

Keywords

photochromism; photomechanical effects; proton transfer; Schiff base; tautomerism

Hrčak ID:

131549

URI

https://hrcak.srce.hr/131549

Publication date:

22.12.2014.

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