Colour-tunable ultralong organic phosphorescence upon temperature stimulus

Niu, Zuoji; Ma, Chaoqun; Ye, Wenpeng; He, Wei; Jia, Wenyong; Shi, Huixian; Shi, Huifang; An, Zhongfu; Huang, Wei

doi:10.1039/c9ra03537k

Cited by 10 publications

(3 citation statements)

References 47 publications

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“…Supramolecular systems with dynamic noncovalent contacts provide an opportunity for the development of responsive materials as the relatively weak and reversible interactions are easy to manipulate through external agents. − Single-component crystalline materials have been studied for their stimuli-responsive behaviors in good detail, and structure–property studies attribute the dynamic nature to packing changes triggered by flexible intermolecular interactions. − Multicomponent crystals on the other hand provide more opportunities vis-à-vis design and fine-tuning of the property but are less explored. Yan and Li et al have reported the fluorescent cocrystals of naphthylvinylpyridine and tetra-fluoroterephthalic acid that display different mechanical responses by using light as external stimuli .…”

Section: Introductionmentioning

confidence: 99%

Sulfonate–Pyridinium Ionic Cocrystal Solvates: Improved Material and Antimicrobial Properties

Ahmad,

Malik,

Ahmad

et al. 2024

Crystal Growth & Design

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Organic cocrystals are attracting the attention of researchers from diverse fields and are the focus of interdisciplinary research. Cocrystals provide a convenient opportunity to realize the property tuning of precursors through an easy and green approach. We extend the scope of sulfonate−pyridinium supramolecular synthons to design ionic cocrystals/molecular salts based on a functionalized sulfonated Schiff base with bipyridyl (1) and bipyridyl ethane (2). The resultant products have been characterized, and their optical properties, including the vaporfluorochromism, have been reported. Structural characterization validates the existence of products in high Z′ ionic form and proton transfer between crystal formers. Hirshfeld studies have been carried out to understand the role and evaluate the contribution of intermolecular interactions toward molecular packing. Improved thermal stability and aqueous solubility, plausibly arising due to their ionic nature, are observed for 1 and 2. A remarkable increase in the aqueous solubility of the Schiff base precursor by a margin of nearly 325 and 400% is observed in the new solid forms 1 and 2, respectively. Cell toxicity studies validate the bioviability of the crystal forms. Improved aqueous solubility and lower cell toxicity studies of 1 and 2 prompted us to investigate them further for their antimicrobial studies, and their antibacterial and antifungal studies are reported.

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Section: Introductionmentioning

confidence: 99%

Sulfonate–Pyridinium Ionic Cocrystal Solvates: Improved Material and Antimicrobial Properties

Ahmad,

Malik,

Ahmad

et al. 2024

Crystal Growth & Design

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“…[ 1,2 ] However, it is still a challenge to realize high RTP performance in organic materials owing to their weak spin–orbit coupling and dominant nonradiative transition of triplet excitons. [ 3–6 ] Numerous efforts have been devoted toward the achievement of high RTP performance, including crystal engineering, [ 7–9 ] self‐assembly, [ 10–13 ] host–guest doping, [ 14–17 ] and polymerization. [ 18–25 ] In a rigid environment, the nonradiative transition of organic phosphors could be largely restricted, thus successfully realizing RTP emission in a series of organic materials.…”

Section: Introductionmentioning

confidence: 99%

The Simpler, the Better: Organic Materials with Adsorption‐Induced Room‐Temperature Phosphorescence for Anti‐Counterfeiting and Dyeing Applications

Liu

Tong

et al. 2023

Advanced Optical Materials

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In recent years, organic room‐temperature phosphorescence (RTP) has been widely investigated owing to its fascinating afterglow characteristics. Consequently, it has been applied in anti‐counterfeiting and information security. However, these applications are limited by cost, substrates, and technological processes. Hence, a simple and environmentally friendly adsorption‐induced RTP system containing sulfonic acid groups is designed for convenient and efficient application. A pure organic compound of (1,1″‐biphenyl)‐4,4″‐disulfonic acid can be easily ionized and dispersed in water. When it is adsorbed on different types of paper and cloth substrates rich in hydroxyl groups, bright RTP emissions with maximum lifetimes of ≈1.1 s are achieved after drying the substrates. The destructive effect of H2O on the intermolecular hydrogen bonds between the phosphor and substrates makes the RTP emissions responsive to the stimuli of water and heat. Furthermore, a white afterglow is realized after doping with Rhodamine B for energy transfer. On the account of the adsorption‐induced RTP effect, four economical applications are demonstrated, wherein one dollar's worth of the phosphor can be used for anti‐counterfeiting 7692 banknotes, printing and dyeing 1538 graphs on cloth, making 196 Chinese knots, and producing 385 writes of encryption information, promoting the further development and commercialization of RTP materials.

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“…[12][13][14][15][16][17][18][19][20][21][22] Consequently, many attractive metal-free RTP materials, including crystalline small molecules, [23][24][25][26] amorphous polymers, [18,[27][28][29][30][31][32] and organic/inorganic hybrid materials, [33][34][35][36][37][38] have been developed taking advantage of the weak nonradiative transition of organic phosphors in rigid microenvironments. [39][40][41][42][43][44][45] Generally, organic phosphors showed efficient phosphorescence at low temperatures because they are ossified. [46][47][48][49][50][51] However, the influence of water, oxygen, temperature, and light on metal-free RTP materials is non-negligible, significantly limiting their potential applications.…”

Section: Introductionmentioning

confidence: 99%

Smart phosphorescence from solid to water through progressive assembly strategy based on dual phosphorescent sources

Xia

Wang

et al. 2023

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Developing smart room‐temperature phosphorescence (RTP) materials with facile and efficient strategies have attracted increasing attention. Herein, tunable RTP materials with two phosphorescent sources and stepwise enhanced phosphorescence in water are obtained through an in‐situ self‐assembly strategy based on the sensitization of phosphors by trimesic acid (TMA) through simple doping and the rigidification of phosphors by hydrogen‐bonded organic frameworks (HOFs). As expected, doped TMA+phosphors simultaneously promote the RTP emission of phosphors and maintain TMA phosphorescence. In‐situ assembled HOF(MA‐TMA)@phosphors facilitate smart RTP emission in water due to the coexistence of phosphorescent HOF(MA‐TMA) host and phosphors guest. Additionally, such RTP materials with good processability demonstrate the application potential in information security, benefitting from their varied afterglow lifetimes and easy luminous recognition in the darkness. This work will inspire the design of dual phosphorescent source RTP systems and provide new strategies for the development of smart RTP materials in water.

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Colour-tunable ultralong organic phosphorescence upon temperature stimulus

Abstract: A new class of single-component molecular crystal with colour-tunable ultralong organic phosphorescence (UOP) was designed and synthesized through alkyl chain engineering.

Cited by 10 publications

References 47 publications

Sulfonate–Pyridinium Ionic Cocrystal Solvates: Improved Material and Antimicrobial Properties

Sulfonate–Pyridinium Ionic Cocrystal Solvates: Improved Material and Antimicrobial Properties

The Simpler, the Better: Organic Materials with Adsorption‐Induced Room‐Temperature Phosphorescence for Anti‐Counterfeiting and Dyeing Applications

Smart phosphorescence from solid to water through progressive assembly strategy based on dual phosphorescent sources

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