Influence of inter- and intramolecular H-bonding on the mesomorphic and photoswitching behaviour of (E)-4-((4-(hexyloxy)phenyl)diazenyl)-N-phenyl benzamides

Abstract

We report on the synthesis, phase behaviour and photoswitching studies of new azo linked rod-shaped molecules.

Regulation of the supramolecular self‐assembly process by the number of 1, 8‐naphthalimide groups in the gelator

“…This result demonstrated J-type aggregate was adopted in gel NE1 from acetonitrile. [71][72][73] The similar change trends in UV-vis absorption spectra of NE1 were appeared on acetonitrile and DMSO (Figure 5e and 5 f). The maximum absorption bands at 359 nm and 362 nm of solution NE1 in ethamol and DMSO were red-shifted to 362 nm and 365 nm in their gel state, respectively.…”

“…UV‐vis absorption spectra of gelator NE1 in ethanol showed only one absorption band at 360 nm, which was red‐shift to 362 nm for its gel state (Figure 5c). This result demonstrated J‐type aggregate was adopted in gel NE1 from acetonitrile [71–73] . The similar change trends in UV‐vis absorption spectra of NE1 were appeared on acetonitrile and DMSO (Figure 5e and 5 f).…”

Photoswitchable luminescent lanthanide complexes controlled and interrogated by four orthogonal wavelengths of light

“…[1][2][3][4][5] The ability to engineer spatio-temporal control over molecular function has led to the development of a wide range of molecular photoswitches, [6][7][8] with applications spanning chemistry, 9 materials science, 10 biology, 11 medicine, 12 and information storage. 13 Azobenzenes are a wellestablished class of molecular photoswitches, undergoing facile photoisomerisation between cis (Z) and trans (E) isomers, with an accompanying change in geometry and dipole moment. 14,15 As a result, many biological applications dependent on the photoisomerisation of azobenzenes have been developed.…”

Evaluation of Photoswitching Properties for Hockey Stick-Shaped Mesogens Bearing Azo Benzene Moieties

“…The time taken for the phase transitions to occur via this isomerization of the photoactive (azobenzene) behavior is significant from an application point of view. The time required for the conversion of trans to cis is faster since it can be controlled using UV intensity; however, the long thermal back relaxation is essential for optical storage devices [13][14][15][16][17].…”