Solid-state Reversible Optical Switch Based on Two Dendritic Molecules with dual sensitivity of mechanochromism and photochromism

2021 ◽  
Author(s):  
Yuhui Yang ◽  
Zhe He ◽  
Junzhao He ◽  
Yuqing Li ◽  
Yilong Chen ◽  
...  
Keyword(s):  
Solid State ◽  
Polymer Matrix ◽  
Optical Switch ◽  
New Method ◽  
Photochromic Molecules ◽  
Conformational Freedom

Efficient isomerization of photochromic molecules requires conformational freedom and is often limited to the solution or polymer matrix. Thus, developing a new method to improve photochromism in the solid state...

Achieving enhanced solid-state photochromism and mechanochromism by introducing a rigid steric hindrance group

2021 ◽  
Author(s):  
Junzhao He ◽  
Huimin Zhao ◽  
Han Wu ◽  
Yuhui Yang ◽  
Zhaohui Wang ◽  
...  
Keyword(s):  
Solid State ◽  
Steric Hindrance ◽  
Solvent Free ◽  
New Method ◽  
Solvent Free Conditions ◽  
Photochromic Molecules ◽  
Conformational Freedom

For photochromic molecules, effective isomerization usually requires conformational freedom,which is usually unavailable in solvent-free conditions. In this work, we report a new method, which can realize the reversible switching of...

Molecular Motion Analysis of 5CB in PDLCs Using Solid-State 13C NMR Relaxation Spectroscopy

1993 ◽  
Vol 47 (7) ◽  
pp. 933-941 ◽  
Author(s):  
Karen L. Buchert ◽  
Jack L. Koenig ◽  
Shi-Qing Wang ◽  
John L. West
Keyword(s):  
Liquid Crystal ◽  
Solid State ◽  
Polymer Matrix ◽  
Nmr Relaxation ◽  
Domain Size ◽  
Chemical Structures ◽  
Similar Chemical ◽  
Polymer Dispersed ◽  
Submicron Droplets ◽  
Significant Change

In samples of polymer-dispersed liquid crystals (PDLCs), submicron droplets of liquid crystal reside within a polymer matrix. By the use of the cross polarization technique for solid-state 13C NMR spectroscopy, the NMR spectrum of the liquid crystal can be obtained without interference from the polymer spectrum, even though the two materials have some similar chemical structures. Both 13C T1 and 13C T1 ρ relaxation experiments were performed on a PDLC system of 5CB in epoxy as a function of 5CB domain size. The 13C T1 relaxation constants and the localized motions they measure showed no significant change over the liquid crystal domain size studied. However, the 13C T1 ρ relaxation constants and the segmental motions of molecules they measure revealed a significant change over the liquid crystal domain size studied. Therefore, the 13C T1 ρ values can be used to determine the change in mobility of the molecular segments of the SCB molecules resulting from increased interaction between the liquid crystal and the polymer matrix and to further understand the importance of the molecular motions of the liquid crystal in the switching phenomenon for PDLC materials.

Investigating structure-fluorescence properties of imidazole fused tetraphenylethylene AIEgens: Reversible mechanofluorochromism and polymer matrix controlled fluorescence tuning

CrystEngComm ◽  
2021 ◽  
Author(s):  
Palaniyappan Nagarasu ◽  
Anu Kundu ◽  
Vijay Thiruvenkatam ◽  
Raghavaiah Pallepogu ◽  
Philip Philip Anthony ◽  
...  
Keyword(s):  
Solid State ◽  
Polymer Matrix ◽  
Fluorescence Properties ◽  
Stimuli Responsive ◽  
Fluorescent Properties ◽  
Imidazole Derivatives

A series of stimuli-responsive AIEgens of tetraphenylethyelene (TPE) fused Imidazole derivatives (1-7) were synthesized and explored their substituents controlled fluorescent properties in the solid state. The structure of the synthesized...

Ultra-thin Solid-State Li-Ion Electrolyte Membrane Facilitated by a Self-Healing Polymer Matrix

2015 ◽  
Vol 27 (43) ◽  
pp. 6922-6927 ◽  
Author(s):  
Justin M. Whiteley ◽  
Philip Taynton ◽  
Wei Zhang ◽  
Se-Hee Lee
Keyword(s):  
Solid State ◽  
Polymer Matrix ◽  
Self Healing ◽  
Electrolyte Membrane ◽  
Li Ion

New Method of Solid-State Dispersion for Increasing Dissolution Rates

1966 ◽  
Vol 55 (11) ◽  
pp. 1323-1324 ◽  
Author(s):  
Michael Mayersohn ◽  
Milo Gibaldi
Keyword(s):  
Solid State ◽  
New Method ◽  
Dissolution Rates

scholarly journals A new method for calibrating the pulse-height defect in solid state detectors

1978 ◽  
Vol 157 (2) ◽  
pp. 325-331 ◽  
Author(s):  
J.B. Moulton ◽  
J.E. Stephenson ◽  
R.P. Schmitt ◽  
G.J. Wozniak
Keyword(s):  
Solid State ◽  
Pulse Height ◽  
New Method ◽  
Solid State Detectors
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