Large thermally irreversible photoinduced shift of selective light reflection in hydrazone-containing cholesteric polymer systems

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00573328" target="_blank" >RIV/68378271:_____/23:00573328 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1002/cphc.202300011" target="_blank" >https://doi.org/10.1002/cphc.202300011</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/cphc.202300011" target="_blank" >10.1002/cphc.202300011</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Large thermally irreversible photoinduced shift of selective light reflection in hydrazone-containing cholesteric polymer systems

Popis výsledku v původním jazyce

In this work we synthesized and studied a comb-shaped hydrazone-containing copolyacrylate exhibited cholesteric liquid crystalline properties with the pitch length of the helix being tuned under irradiation with light. In the cholesteric phase selective light reflection in near IR spectral range was measured and large blue shift of reflection peak from 1650 nm to 500 nm was found under blue light irradiation. This shift is related to Z-E isomerization of photochromic hydrazone-containing groups and photochemically reversible. Improved and faster photooptical response was found after doping of copolymer with 10wt% of low-molar-mass liquid crystal. It is noteworthy that both isomers of the hydrazone photochromic group are thermally stable that enable to achieve pure photoinduced switch without any dark relaxation at any temperatures. Large photoinduced shift of the selective light reflection together with thermal bistability make such systems promising for the application in photonics.

Název v anglickém jazyce

Large thermally irreversible photoinduced shift of selective light reflection in hydrazone-containing cholesteric polymer systems

Popis výsledku anglicky

In this work we synthesized and studied a comb-shaped hydrazone-containing copolyacrylate exhibited cholesteric liquid crystalline properties with the pitch length of the helix being tuned under irradiation with light. In the cholesteric phase selective light reflection in near IR spectral range was measured and large blue shift of reflection peak from 1650 nm to 500 nm was found under blue light irradiation. This shift is related to Z-E isomerization of photochromic hydrazone-containing groups and photochemically reversible. Improved and faster photooptical response was found after doping of copolymer with 10wt% of low-molar-mass liquid crystal. It is noteworthy that both isomers of the hydrazone photochromic group are thermally stable that enable to achieve pure photoinduced switch without any dark relaxation at any temperatures. Large photoinduced shift of the selective light reflection together with thermal bistability make such systems promising for the application in photonics.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/GC20-22615J" target="_blank" >GC20-22615J: Světlem řízené kapalně krystalické polymery s hydrazonovou nebo azobenzenovou skupinou určené pro fotoniku.</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ChemPhysChem

ISSN

1439-4235

e-ISSN

1439-7641

Svazek periodika

24

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

e202300011

Kód UT WoS článku

000955344900001

EID výsledku v databázi Scopus

2-s2.0-85150612052