A Novel Type of Crown Ether-Containing Metal Ions Optical Sensors Based on Polymer-Stabilized Cholesteric Liquid Crystalline Films

2012 ◽  
Vol 33 (21) ◽  
pp. 1875-1881 ◽  
Author(s):  
Vladislav Stroganov ◽  
Alexander Ryabchun ◽  
Alexey Bobrovsky ◽  
Valery Shibaev
Keyword(s):  
Crown Ether ◽  
Metal Ions ◽  
Optical Sensors ◽  
Liquid Crystalline ◽  
Crystalline Films ◽  
Polymer Stabilized ◽  
Cholesteric Liquid Crystalline

scholarly journals Rotational Reorganization of Doped Cholesteric Liquid Crystalline Films

2006 ◽  
Vol 128 (44) ◽  
pp. 14397-14407 ◽  
Author(s):  
Rienk Eelkema ◽  
Michael M. Pollard ◽  
Nathalie Katsonis ◽  
Javier Vicario ◽  
Dirk J. Broer ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Crystalline Films ◽  
Cholesteric Liquid Crystalline

A chromogenic crown ether as a sensing molecule in optical sensors for the detection of hard metal ions

1988 ◽  
pp. 893-895 ◽  
Author(s):  
Jos van Gent ◽  
Ernst J. R. Sudhölter ◽  
Paul V. Lambeck ◽  
Theo J. A. Popma ◽  
Gerrit J. Gerritsma ◽  
...  
Keyword(s):  
Crown Ether ◽  
Metal Ions ◽  
Optical Sensors ◽  
Hard Metal

Dual mechanochromism of cellulosic cholesteric liquid-crystalline films: wide-ranging colour control and circular dichroism inversion by mechanical stimulus

2018 ◽  
Vol 6 (6) ◽  
pp. 1370-1376 ◽  
Author(s):  
K. Miyagi ◽  
Y. Teramoto
Keyword(s):  
Circular Dichroism ◽  
Liquid Crystalline ◽  
Colour Change ◽  
Mechanical Stimulus ◽  
Crystalline Films ◽  
Circular Dichroïsm ◽  
Cholesteric Liquid Crystalline

We found that cellulosic liquid-crystalline films displayed not only a wide-ranging colour change but also inversion of circular dichroism upon a mechanical stimulus.

ChemInform Abstract: A Chromogenic Crown Ether as a Sensing Molecule in Optical Sensors for the Detection of Hard Metal Ions.

ChemInform ◽  
1989 ◽  
Vol 20 (3) ◽  
Author(s):  
J. VAN GENT ◽  
E. J. R. SUDHOELTER ◽  
P. V. LAMBECK ◽  
T. J. A. POPMA ◽  
G. J. GERRITSMA ◽  
...  
Keyword(s):  
Crown Ether ◽  
Metal Ions ◽  
Optical Sensors ◽  
Hard Metal

scholarly journals Steady state charge conduction through solution processed liquid crystalline lanthanide bisphthalocyanine films

2019 ◽  
Vol 23 (11n12) ◽  
pp. 1603-1615
Author(s):  
Chandana Pal ◽  
Isabelle Chambrier ◽  
Andrew N. Cammidge ◽  
A. K. Sharma ◽  
Asim K. Ray
Keyword(s):  
Metal Ions ◽  
Liquid Crystalline ◽  
Microscopy Study ◽  
Individual Characteristics ◽  
Central Metal ◽  
Force Microscopy ◽  
Atomic Force ◽  
Double Decker ◽  
Order Of Magnitude ◽  
Chain Lengths

In-plane electrical characteristics of non-peripherally octyl(C[Formula: see text]H[Formula: see text]- and hexyl(C[Formula: see text]H[Formula: see text]-substituted liquid crystalline (LC) double decker lanthanide bisphthalocyanine (LnPc[Formula: see text] complexes with central metal ions lutetium (Lu), and gadolinium (Gd) have been measured in thin film formulations on interdigitated gold (Au) electrodes for the applied voltage ([Formula: see text] range of [Formula: see text]. The conduction mechanism is found to be Ohmic within the bias of [Formula: see text] while the bulk limited Poole–Frenkel mechanism is responsible for the higher bias. The compounds show individual characteristics depending on the central metal ions, substituent chain lengths and their mesophases. Values of 67.55 [Formula: see text]cm[Formula: see text] and 42.31 [Formula: see text]cm[Formula: see text] have been obtained for room temperature in-plane Ohmic conductivity of as-deposited octyl lutetium (C[Formula: see text]LuPc[Formula: see text] and hexyl gadolinium (C[Formula: see text]GdPc[Formula: see text] films, respectively while C[Formula: see text]GdPc[Formula: see text] films exhibit nearly two orders of magnitude smaller conductivity. On annealing at 80[Formula: see text]C, Ohmic conductivities of C[Formula: see text]LuPc[Formula: see text] and C[Formula: see text]GdPc[Formula: see text] are found to have increased but the conductivity of C[Formula: see text]GdPc[Formula: see text] decreased by more than one order of magnitude to 1.5 [Formula: see text]cm[Formula: see text]. For physical interpretation of the charge transport behavior of these three molecules, their UV-vis optical absorption spectra in the solution and in as-deposited and annealed solid phases and atomic force microscopy study have been performed. It is believed that both orientation and positional reorganizations are responsible, depending upon the size of the central ion and side chain length.

Side-Chain Cholesteric Liquid Crystalline Elastomers Derived from a Mesogenic Cross-Linking Agent

2003 ◽  
Vol 36 (24) ◽  
pp. 9060-9066 ◽  
Author(s):  
Jian-She Hu ◽  
Bao-Yan Zhang ◽  
Ying-Gang Jia ◽  
Song Chen
Keyword(s):  
Liquid Crystalline ◽  
Side Chain ◽  
Cross Linking ◽  
Cholesteric Liquid Crystalline
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