Pseudo-enantiomeric chiral components and formation of the helical micro- and nanostructures in charge-transfer complexes

Helical organic micro- and nanostructures are formed by a charge-transfer complex, cinchonidine-TCNQ. These unusual forms result from the chirality, the steric structure and specific interactions of cinchonidine molecules. These materials are semiconductors (10 −4 S cm −1 ), with the typical absorption spectra in IR and UV-vis, but also have a characteristic of CD spectrum. Surprisingly, conductive micro and nano helices are not formed in pseudo-enantiomeric cinchonine, i.e. the complex of cinchonine and TCNQ.

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Water-Soluble Visible Light Sensitive Photoinitiating System Based on Charge Transfer Complexes for the 3D Printing of Hydrogels

Polymers ◽

10.3390/polym13183195 ◽

2021 ◽

Vol 13 (18) ◽

pp. 3195

Author(s):

Hong Chen ◽

Mehdi Vahdati ◽

Pu Xiao ◽

Frédéric Dumur ◽

Jacques Lalevée

Keyword(s):

Charge Transfer ◽

3D Printing ◽

Visible Light ◽

Water Solubility ◽

Charge Transfer Complex ◽

Water Soluble ◽

Charge Transfer Complexes ◽

Free Radical Photopolymerization ◽

Potential Applications ◽

A Charge

The development of visible-light 3D printing technology by using water-soluble initiating systems has attracted widespread attention due to their potential applications in the manufacture of hydrogels. Besides, at present, the preparation of water-soluble photoinitiators suitable for visible light irradiation (such as LEDs) still remains a challenge. Therefore, this work is devoted to developing water-soluble photoinitiators (PI)/photoinitiating systems (PIS) upon irradiation with a LED @ 405 nm. In detail, a new water-slightly-soluble chalcone derivative dye [(E)-3-(4-(dimethylamino) phenyl)-1-(4-(2-(2-(2-methoxyethoxy) ethoxy) ethoxy) phenyl) prop-2-en-1-one] was synthesized here and used as a PI with a water-soluble coinitiator, i.e., triethanolamine (TEA) which was also used as an electron donor. When combined together, a charge transfer complex (CTC) formed immediately which exhibited excellent initiating ability for the free radical photopolymerization of poly(ethyleneglycol)diacrylate (PEG-DA). In light of the powerful CTC effect, the [dye-TEA] CTC could not only exhibit enhanced water solubility and mechanical properties but could also be effectively applied for 3D printing. This CTC system is environmentally friendly and cost-saving which demonstrates a great potential to prepare hydrogels via photopolymerization.

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Thin Film Formations of Charge Transfer Complexes with Metallic Properties by Vacuum Deposition Method

MRS Proceedings ◽

10.1557/proc-173-137 ◽

1989 ◽

Vol 173 ◽

Cited By ~ 5

Author(s):

M. Yudasaka ◽

K. Hironaga ◽

H. Yamochi ◽

K. Nakanishi ◽

G. Saito

Keyword(s):

Charge Transfer ◽

Charge Transfer Complex ◽

Charge Transfer Complexes ◽

Deposition Method ◽

Vacuum Deposition ◽

Supply Rate ◽

Crystalline Films ◽

A Charge ◽

Substrate Temperatures ◽

Vacuum Deposition Method

ABSTRACTThin films of a charge transfer complex, hepta-(tetrathiafulvalene) pentaiodide ( TTF7I5, TTF:I0-71 ), were prepared by double source evaporation of TTF and iodine. Crystalline films of TTF:I0-7i were obtained when substrate temperatures were kept between 0°C and 25°C. Orientation alignment of the crystalline films were affected by supply rate of iodine. By controlling the substrate temprature and the supply rate of iodine, highly oriented crystalline films were grown on mica substrates. It showed strong dichroism and anisotropic electrical propert ies.

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Sunlight assisted direct amide formation via a charge-transfer complex

Chemical Communications ◽

10.1039/c7cc05300b ◽

2017 ◽

Vol 53 (73) ◽

pp. 10128-10131 ◽

Cited By ~ 9

Author(s):

Irit Cohen ◽

Abhaya K. Mishra ◽

Galit Parvari ◽

Rachel Edrei ◽

Mauricio Dantus ◽

...

Keyword(s):

Charge Transfer ◽

Carbon Tetrachloride ◽

Charge Transfer Complex ◽

Photochemical Reactions ◽

Charge Transfer Complexes ◽

Amide Formation ◽

A Charge

We report on the use of charge-transfer complexes between amines and carbon tetrachloride, as a novel way to activate the amine for photochemical reactions.

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