Amplification of dissymmetry factors by dihedral angle engineering in donor–acceptor type circularly polarized luminescence materials

Abstract

By employing aza[7]helicene as the chiral donor and triazine as the acceptor, we have developed a new type of circularly polarized luminescence materials. The influence of the dihedral angle between...

Stimuli responsive actuators: recent advances

“…These include high capacitance, impressive electrical and thermal conductivity, excellent electro-magnetic wave absorption, hydrophilicity, mechanical stability and notable dispersibility in various polar solvents. [9][10][11][12][13][14] MXenes also exhibit superior light absorption across a wide wavelength range of 300-1300 nm, with reported photo-thermal conversion efficiency up to 100%. 15,16 Additionally, the thermal expansion effect and the ability to undergo reversible volume changes make MXenes advantageous for application in photothermal responsive actuators.…”

Chiral hybrid manganese(ii) halide clusters with circularly polarized luminescence for X-ray imaging

“…Materials with circularly polarized luminescence (CPL) have attracted widespread attention due to their wide potential applications for 3D displays, optical data storage, photoelectric devices, asymmetric synthesis, and so on. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] In general, the degree of circular polarization is defined by the strength of left and right circularly polarized light (I L and I R ). 20 In order to effectively evaluate the intrinsic properties of CPL materials, the luminescence dissymmetry factor (g lum ) is defined as the difference between the strength of I L and I R divided by their average total luminescence strength, namely g lum = 2 Â (I L À I R )/ (I L + I R ).…”

Push–pull [7]helicene diimide: excited-state charge transfer and solvatochromic circularly polarised luminescence

“…20 Building upon our previous work on [n]HDIs, we aim to further amplify the chiroptical properties of these compounds by venturing into the creation of push-pull [n]HDIs. [21][22][23][24] This strategic endeavour is anticipated to expand our understanding of chiral imide-based molecules and to open new horizons for enhancing their performance and applicability. 25 Herein, we present the synthesis and characterization of a push-pull 9, 10-dimethoxy- [7]helicene diimide 2 (Fig.…”