An easily coatable temperature responsive cholesteric liquid crystal oligomer for making structural colour patterns

Zhang, Pei; Kragt, Augustinus J. J.; Schenning, Albertus P. H. J.; Haan, Laurens T. de; Zhou, Guofu

doi:10.1039/c8tc02252f

Cited by 81 publications

(95 citation statements)

References 40 publications

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“…[34] Diacrylate LC monomer 1 (83.07 wt%) and chiral diacrylate dopant 2 (8 wt%) were mixed with butylamine 3 (8.93 wt%) ( Figure 1A). [34] Diacrylate LC monomer 1 (83.07 wt%) and chiral diacrylate dopant 2 (8 wt%) were mixed with butylamine 3 (8.93 wt%) ( Figure 1A).…”

Section: Resultsmentioning

confidence: 99%

“…[34] Diacrylate LC monomer 1 (83.07 wt%) and chiral diacrylate dopant 2 (8 wt%) were mixed with butylamine 3 (8.93 wt%) ( Figure 1A). [34] For example, upon cooling from 61 to 24 °C, the reflection band shifted from 715 to 1100 nm, out of the visible spectrum ( Figure S3, Supporting Information). The oligomer was then applied to a rubbed polyvinyl alcohol (PVA) functionalized glass substrate via blade coating.…”

Section: Resultsmentioning

confidence: 99%

“…[34] Here, we report on the development of a versatile photonic bilayer system that can reversibly reveal and conceal a pattern upon stretching and releasing. [34] Here, we report on the development of a versatile photonic bilayer system that can reversibly reveal and conceal a pattern upon stretching and releasing.…”

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confidence: 99%

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A Patterned Mechanochromic Photonic Polymer for Reversible Image Reveal

Zhang

Shi

Schenning

et al. 2019

Adv Materials Inter

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octopus, and so on) are able to produce a wide range of structural colors and photonic patterns to signal and communicate with their own species and others. [4,7] Inspired by nature, scientific efforts have been devoted to develop smart photonic materials which inform the user by changing their structural color. [8][9][10] Mechanochromic photonic materials, which change structural color in response to mechanical stimuli, are attractive for a wide range of applications such as strain mapping, [11,12] stress sensing, [13][14][15][16] anti-counterfeiting, [17][18][19] tunable optical devices, [20,21] and so on. Different materials, such as inorganic, polymeric, and hybrid components have been used to fabricate these mechanochromic photonic devices. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] Among these smart materials, cholesteric liquid crystals (CLCs) have garnered significant attention in the

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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A Patterned Mechanochromic Photonic Polymer for Reversible Image Reveal

Zhang

Shi

Schenning

et al. 2019

Adv Materials Inter

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“…Дикетонаты дифторида бора являются популярными объектами исследования благодаря своей доступности, устойчивости и наличию люминесцентных свойств [1][2][3][4][5][6][7][8][9][10]. Исследование фотофизических свойств дикетонатных комплексов бора, растворенных в органических растворителях, показало значительную зависимость спектральных свойств от молекулярной архитектуры и в первую очередь от наличия заместителей, сопряженных с хелатным циклом.…”

Section: Introductionunclassified

Synthesis and Structure Study of Asymmetric Binuclear Complex of Boron Difluoride

Puzyrkov¹,

Gribova²,

Guzova³

et al. 2020

Chem

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Дальневосточный федеральный университет, г. Владивосток, РоссияПолучен разнолигандный двуядерный комплекс дифторида бора (1), в котором два дикетонатных цикла соединены атомом серы через центральные атомы углерода (). В одном цикле в качестве -заместителей присутствует две метильных группыацетилацетонатный фрагмент (acac), во втором -метильная и фенильная группыбензоилацетонатный фрагмент (bzac). Полученный комплекс охарактеризован методами ИК и ПМР спектроскопии и рентгеноструктурного анализа (РСА). По данным РСА, структура полученного комплекса повторяет структуру ароматических сульфидов. Рассмотрено взаимодействие заместителей, стоящих у и -углеродных атомов. 1 С 15 H 14 O 4 B 2 F 4 S, M 387,94, T 293(2) K, моноклинная, P2 1 /c, a = 7,893(12), b = 23,41(4), c = 9, 393(13) Å,  = 90,  = 103,32(6),  = 90 град., V = 1689(5) Å 3 , Z = 4, ρ = 1,525 г/см 3 , µ = 0,252 мм 1 , F(000) = 792,0, размер кристалла 0,6×0,23×0,23 мм, 2 = 5,6682,24 град., интервалы индексов -14 ≤ h ≤ 14, -36 ≤ k ≤ 36, -12 ≤ l ≤ 12, всего отражений 37642, независимых отражений 6665, GOOD 1,320, независимых переменных 238, R int = 0,0843, R 1 = 0,1198, wR 2 = 0,3542. Сведения о структуре полученного комплекса (таблицы координат атомов, длин связей и валентных углов) депонированы в Кембриджском банке структурных данных № 1911543, deposit@ccdc.cam.ac.uk; http://www.ccdc. cam.ac.uk).Ключевые слова: ацетилацетонат дифторида бора, бензоилацетонат дифторида бора, двухядерные комплексы, рентгеноструктурный анализ.

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“…These photonic materials are well known for their ability to respond to environmental factors such as temperature and humidity. For the creation of color contrast in a single layer, Ch‐LC materials are typically first illuminated through a mask after which they are heated to affect the helical twisting power (HTP) or to above the cholesteric to isotropic phase transition temperature . However, reports about the responsive behavior of elastomeric multicolored polymer coatings remain scarce …”

Section: Introductionmentioning

confidence: 99%

Tunable Photonic Materials via Monitoring Step‐Growth Polymerization Kinetics by Structural Colors

Heeswijk

Yang

Grossiord

et al. 2019

Adv Funct Materials

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The functional and responsive properties of elastomeric materials highly depend on crosslink density and molecular weight between crosslinks. However, tedious analytical steps are needed to obtain polymer network structure–property relationships. In this article, an in situ structure–property characterization method is reported by monitoring the structural color change in a photonic elastomeric material. The photonic materials are prepared in a two‐step polymerization process. First, linear chain extension occurs via Michael addition. Second, photopolymerization ensures crosslinking, resulting in the formation of an elastomeric photonic network. During the first step, the step‐growth polymer process can be monitored by following the photonic reflection band redshift, allowing to program the molecular weight between the crosslinks. During network formation, the crosslink density, chain length between crosslinks, and the colors are “frozen in.” These processes can be locally controlled creating both single‐layered multicolor patterned and broadband reflective coatings at room temperature. The scalability of the coating process is further demonstrated by using a gravure printing technique. Additionally, the final coatings are made responsive toward specific solvents and temperature. Here the modulus, response, and color of the coating are controlled by tuning the crosslink density and molecular weight between crosslinks of the elastomeric material.

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An easily coatable temperature responsive cholesteric liquid crystal oligomer for making structural colour patterns

Abstract: A crosslinkable, temperature-responsive cholesteric main-chain liquid crystal oligomer was prepared, and used to make patterned coatings.

Cited by 81 publications

References 40 publications

A Patterned Mechanochromic Photonic Polymer for Reversible Image Reveal

A Patterned Mechanochromic Photonic Polymer for Reversible Image Reveal

Synthesis and Structure Study of Asymmetric Binuclear Complex of Boron Difluoride

Tunable Photonic Materials via Monitoring Step‐Growth Polymerization Kinetics by Structural Colors

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