Simple and general platform for highly adjustable thermochromic fluorescent materials and multi-feasible applications

Du, Jiahui; Sheng, Lan; Chen, Qiaonan; Xu, Yan; Li, Wen; Wang, Xiaojun; Li, Minjie; Zhang, Sean Xiao‐An

doi:10.1039/c9mh00253g

Cited by 56 publications

(56 citation statements)

References 62 publications

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“…Clearly, selective fluorescence deactivation (TPE/EC-AuNS@paper) or activation (RhB/TdOH-AuNS@paper and PTDI/DMA/OC-AuNS@paper) is achieved on the illuminated spot, thus leading to on-off or off-on NIR-induced emission modulation, respectively. www.advopticalmat.de modulation phenomena relying on reversible interchromophoric interactions (e.g., excimer formation [43,45] ). Consequently, facile tuning of the emission color (e.g., from blue TPE to reddish PTDI fluorescence) and switching scheme of the resulting materials (e.g., on-off or off-on) could be achieved by simply varying the dye of choice, as already demonstrated.…”

Section: Generalization Of Nir-induced Fluorescence Modulation In Pcmsmentioning

confidence: 99%

Solid Materials with Near‐Infrared‐Induced Fluorescence Modulation

Otaegui

Rubirola

Ruiz‐Molina

et al. 2020

Advanced Optical Materials

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which are exploited in high-density data storage [13,14] and information processing, [15] white light generation, [16] (bio) sensing and imaging, [17-20] anticounterfeiting technologies, [21,22] and photowritable/erasable fluorescent inks, [23] among other areas. For many of these applications, the use of near-infrared (NIR) radiation to achieve luminescence modulation would be highly beneficial, e.g., to reach higher penetration depths with lower photodamage for (bio)imaging probes [18,24] or to develop advanced security inks for anticounterfeiting. [25] Currently, most common methodologies applied to achieve fluorescence modulation are based on the reversible interconversion of photochromic dyes. [9,10,11-18,19-21] However, these systems suffer from important drawbacks that are limiting their application in commercial products. On one hand, the interconversion of photochromic dyes are generally based on isomerization processes that involve large polarity and geometrical changes, which are often detrimentally affected by the surrounding matrix when these compounds are transferred from solution to the solid state. This is especially the case for photoswitchable luminescent materials based on T-type photochromes, [26] for which novel strategies are being developed to favor dye (photo) isomerization in solid matrices (e.g., by covalently attaching bulky moieties to increase the surrounding free volume [22,27] or by using photoisomersable compounds with minimal conformational changes [26,28]). On the other hand, photochromic dyes typically operate under highly energetic UV or visible radiation (e.g., spiropyrans) which contributes significantly to fast dye degradation. [29] Actually, making photochromic compounds sensitive to NIR radiation still remains a challenge that requires intricate synthetic procedures [30-33] and/or multiphoton excitation under high irradiation powers. [34-40] As such, their incorporation into more complex systems to attain NIR-induced luminescence modulation has been largely hampered to date. As an alternative to photochromic-based systems, we report herein a conceptually different strategy to obtain NIR-driven fluorescence modulation in the solid state, which takes advantage of a) the recent discovery by us [41-43] and others [44-47] that the emission of selective dyes dispersed in phase change materials (PCMs) can be thermally varied upon solid-to-liquid Solid molecular materials modulating their luminescent properties upon irradiation are typically based on photochromic dyes. Despite these are potentially interesting for applications such as anticounterfeiting, bioimaging, optical data storage, and writable/erasable devices, key features are preventing their use in marketable products: the lack of straightforward strategies to obtain near infrared (NIR) radiation-responding photochromic dyes and the dramatic response modification these molecules suffer in solids. Herein a photochrome-free approach is reported to achieve solid materials whose luminescence modulation is induced by NIR radi...

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Section: Generalization Of Nir-induced Fluorescence Modulation In Pcmsmentioning

confidence: 99%

Solid Materials with Near‐Infrared‐Induced Fluorescence Modulation

Otaegui

Rubirola

Ruiz‐Molina

et al. 2020

Advanced Optical Materials

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“…Recently, thermochromic luminescent materials (TLMs), including those based on small molecules, polymers, and nanomaterials, demonstrated a great potential for photonic applications including thermometers, bioimaging, displays, optical information recording, security applications, etc. Generally, there are three common strategies of TLM design.…”

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confidence: 99%

Chameleon‐Like Thermochromic Luminescent Materials with Controllable Response Behaviors for Multilevel Security Printing

Dong

Liu

et al. 2020

Advanced Optical Materials

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Materials exhibiting reversible changes of their photoluminescence properties upon exposure to heat have an immense potential in various advanced photonic applications. Particularly, the control over an on‐demand response of thermochromic luminescent materials (TLMs) similar to a chameleon is of great importance. However, it is still difficult and challenging to achieve it. Therefore, this paper reports a simple and effective way to construct TLMs, which involves the incorporation of the metal–ligand complexes into polyethylene glycol (PEG). Ratiometric or off–on response modes of these TLMs can be tuned by incorporating metal complexes based on either Zn2+ or Co2+ into PEG and by taking advantage of reversible metal–ligand coordination, dissociation, or excited‐state conformation changes of the resulting materials. Moreover, by choosing PEG matrices with different molecular weights, the thermochromic transition temperatures of these TLMs can be tuned. It is also demonstrated that the controllable response behavior of these chameleon‐like TLMs can be used in applications related to real‐life anti‐counterfeiting and security printing. This work opens novel opportunities for the development of smart materials with controllable responses useful for advanced photonic applications.

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“…When the temperature is lower than this value, the original color is restored [4]. The thermochromic coating can not only be used for surface temperature measurement [5], 3D printing [6], overtemperature warning [7], and anti-counterfeiting identification [8], but also for decoration [9]. At present, most of the thermochromic coatings are prepared by adding thermochromic materials into the coatings [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Coating Process on Performance of Reversible Thermochromic Waterborne Coatings for Chinese Fir

2020

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The effect of the coating process on the properties of reversible thermochromic waterborne coating on the surface of Chinese fir was examined. The results demonstrated that the most critical process parameter affecting the color difference and gloss of the coating was the way of adding thermochromic ink. The coating process had little influence on the adhesion, impact resistance adding, liquid resistance, and original properties of the coating. There was no obvious gloss variation in the coating under different coating processes. For the (3+3) layered coatings, when the thermochromic ink was added to the topcoats, the discoloration performance was the most obvious and the comprehensive performance of coating was better. Meanwhile, the gloss was 55.6%, the adhesion grade was grade 0, the impact resistance was 5.0 kg·cm, the liquid resistance grade of the coating to sodium chloride, ethanol and detergent was grade 1, and the liquid resistance grade to red ink was grade 3. The discoloration performance of the coating was stable under the conditions of aging and time change. This study provides new insight into preparing thermochromic intelligent waterborne wood coatings with potential practical applications on Chinese fir wood surfaces, and also lays a foundation for its application in furniture engineering.Coatings 2020, 10, 223 2 of 15 consumption. Wang et al. [14] prepared a poly-3,4-ethylene dioxythiophene coating, which provided a new idea for the preparation of a highly conductive coating with an obvious thermochromic effect on the textile pattern. Pan et al. [15] prepared the thermochromic vanadium dioxide films co-sputtered by vanadium and stainless-steel. It has good durability in high-temperature environments, whether humid or dry. The thermochromic coatings in these studies are chiefly used in the fields of windows, buildings, fabrics, infrared sensors, etc., while research on the thermochromic waterborne coatings applied to the surface of furniture and wood is relatively rare.Organic reversible thermochromic materials are mainly composed of chromogenic agents and solvent, which have significant characteristics in the temperature of color change, color combination, and color contrast before and after color change [16]. Therefore, compared with inorganic and liquid crystal thermochromic materials, organic thermochromic materials are more popular because of their sensitive color change, rich color, good durability, long shelf life, and low cost. Organic reversible thermochromic ink has the advantages of convenient detection. They are fast, accurate, have no need for additional auxiliary equipment, and have a broad application prospect in thermochromic coatings [17]. Chinese fir is highly applied to construction, in bridges, house furnishings, woodwork, and other domains [18], on account of its light weight, good machinability, resistance to deforming, insect-resistance, anti-corrosion, and other excellent properties [19]. Waterborne wood coatings are free of volatile organic compounds (VOCs) [20] and air co...

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Simple and general platform for highly adjustable thermochromic fluorescent materials and multi-feasible applications

Abstract: A simple and general platform for thermochromic fluorescent materials with excellent performance and multiple feasible applications.

Cited by 56 publications

References 62 publications

Solid Materials with Near‐Infrared‐Induced Fluorescence Modulation

Solid Materials with Near‐Infrared‐Induced Fluorescence Modulation

Chameleon‐Like Thermochromic Luminescent Materials with Controllable Response Behaviors for Multilevel Security Printing

Effect of Coating Process on Performance of Reversible Thermochromic Waterborne Coatings for Chinese Fir

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