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231226s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202306089
|2 doi
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|a pubmed24n1386.xml
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|a eng
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|a Chen, Weilong
|e verfasserin
|4 aut
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|a Push-Pull Heptamethines Near the Cyanine Limit Exhibiting Large Quadratic Electro-Optic Effect
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|c 2024
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|a Text
|b txt
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Revised 25.04.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2023 Wiley‐VCH GmbH.
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|a Harnessing the quadratic electro-optic (QEO) of near-infrared polymethine chromophores over broad telecom wavelength bands is a subject of immense potential but remains largely under-investigated. Herein a series of push-pull heptamethines containing the tricyanofuran (TCF) acceptors and indoline or benzo[e]indoline donors are reported. These dipolar chromophores can attain a highly delocalized "cyanine-like" electronic ground state in solvents spanning a wide range of polarities, in some cases even closer to the ideal polymethine state than symmetrical cyanines. A transmission-mode electromodulation spectroscopy is used to study the electric-field-induced changes in optical absorption and refraction of polymer films doped with heptamethine chromophores, and large and thermally stable QEO effect with high efficiency-loss figure-of-merits that compare favorably to those from dipolar polyenes in poled or unpoled polymers and III-V semiconductors is obtained. The study opens a path for developing organic materials based on cyanine-like merocyanines for complementary metal oxide semiconductor -compatible, fast, efficient, and low-loss electro-optic modulation
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|a Journal Article
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|a cyanine‐like
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|a figure‐of‐merits
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|a push–pull heptamethines
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|a quadratic electro‐optic
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|a transmission‐mode electromodulation
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|a Liu, Taili
|e verfasserin
|4 aut
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|a Zou, Jie
|e verfasserin
|4 aut
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|a Zhang, Di
|e verfasserin
|4 aut
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|a Tse, Man Kit
|e verfasserin
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|a Tsang, Sai-Wing
|e verfasserin
|4 aut
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|a Luo, Jingdong
|e verfasserin
|4 aut
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|a Jen, Alex K-Y
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 36(2024), 17 vom: 08. Apr., Seite e2306089
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|x 1521-4095
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|g volume:36
|g year:2024
|g number:17
|g day:08
|g month:04
|g pages:e2306089
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|u http://dx.doi.org/10.1002/adma.202306089
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