BioAIEgens derived from rosin: how does molecular motion affect their photophysical processes in solid state?

Cai, Xu‐Min; Lin, Yung‐Kuo; Liu, Ying; Chen, Xinfei; Wang, Zaiyu; Zhao, Xueqian; Huang, Shenlin; Zhao, Zheng; Tang, Ben Zhong

doi:10.1038/s41467-021-22061-y

Cited by 82 publications

(39 citation statements)

References 53 publications

(22 reference statements)

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“…Some free excitons radiate photons and return to the ground state directly, which is known as free-exciton emission. Due to lattice distortion caused by strong electron–phonon coupling, some excitons become self-trapped, emitting photons with reduced energy before returning to the ground state [ 40 ]. This STE radiative process leads to the broad emission spectra of the two 1D MHPs.…”

Section: Resultsmentioning

confidence: 99%

Temperature-Responsive Photoluminescence and Elastic Properties of 1D Lead Halide Perovskites R- and S-(Methylbenzylamine)PbBr3

Feng

Fan

et al. 2022

Molecules

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Low-dimensional metal halide perovskites (MHPs) have received much attention due to their striking semiconducting properties tunable at a molecular level, which hold great potential in the development of next-generation optoelectronic devices. However, the insufficient understanding of their stimulus-responsiveness and elastic properties hinders future practical applications. Here, the thermally responsive emissions and elastic properties of one-dimensional lead halide perovskites R- and S-MBAPbBr3 (MBA+ = methylbenzylamine) were systematically investigated via temperature-dependent photoluminescence (PL) experiments and first-principles calculations. The PL peak positions of both perovskites were redshifted by about 20 nm, and the corresponding full width at half maximum was reduced by about 40 nm, from ambient temperature to about 150 K. This kind of temperature-responsive self-trapped exciton emission could be attributed to the synergistic effect of electron–phonon coupling and thermal expansion due to the alteration of hydrogen bonding. Moreover, the elastic properties of S-MBAPbBr3 were calculated using density functional theory, revealing that its Young’s and shear moduli are in the range of 6.5–33.2 and 2.8–19.5 GPa, respectively, even smaller than those of two-dimensional MHPs. Our work demonstrates that the temperature-responsive emissions and low elastic moduli of these 1D MHPs could find use in flexible devices.

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Section: Resultsmentioning

confidence: 99%

Temperature-Responsive Photoluminescence and Elastic Properties of 1D Lead Halide Perovskites R- and S-(Methylbenzylamine)PbBr3

Feng

Fan

et al. 2022

Molecules

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“…The scope of aggregate materials and the underlying aggregate science is thus huge, with enormous potential. The AIE phenomenon certainly works as an excellent prototypical example to shed light on the significance of aggregate science, but it represents just one branch of aggregate science. − By studying more aggregate materials and unveiling the relationships between aggregate structure (self-assembly type, crystal packing state, and morphology) and aggregate performance, key factors that result in the deviation between molecular properties and aggregate performance and that influence the macroscopic performance of matter during processing may be unveiled, which is of both fundamental importance and practical application value. Although AIE research has made a good start for aggregate science, there is still plenty of room for further advances.…”

Section: Conclusion and Perspectivesmentioning

confidence: 99%

Aggregate Materials beyond AIEgens

Zhao

Tang

2021

Acc. Mater. Res.

Self Cite

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Metrics & MoreArticle RecommendationsCONSPECTUS: Aggregate materials focus on the materials that are constituted by more than a single entity. It could be dimers, trimers, or multimers formed by the group of same molecules or mixtures formed by different molecules. Although materials have different forms such as liquid, hydrogel, colloidal suspension, and powder, aggregates undisputedly are among the most commonly existing forms, which involve many aspects of human daily life such as the clothes we wear, the drugs we take, the food we eat, and the tools and devices we use. Sciences related to aggregate materials are also rich. From molecules to aggregates, different aspects of science such as crystallography, interfacial science, supramolecular science, and engineering science may be involved. Therefore, research on aggregate materials and related mechanisms that dominate the properties of aggregate materials is significant. However, it is noteworthy that reductionism is the dominant research philosophy for the design of traditional materials, and it claims that a molecule is the smallest particle of a substance that retains all of the properties of the substance. Consequently, scientists have expended a lot of effort to develop new molecules and to study the relationships between molecular structure and properties without paying attention to aggregate tuning. Actually, more and more research supports the fact that aggregate control such as the tuning of the packing mode, self-assembly, and morphology could work as a more versatile and effective strategy to endow materials with rich properties and functions. A prototype of the aggregate research is the aggregation-induced emission (AIE) phenomenon and materials. AIE research mainly focuses on the luminescence change accompanied by the aggregation process. After more than 20 years of flourishing development, AIE research has made great advances in new material development, mechanism studies, and hightechnology applications. More importantly, AIE research opens the window to aggregate science and demonstrates that new behaviors and functions that are absent in single molecular species can be generated in molecular aggregates.In this Account, we highlight our efforts toward aggregate materials beyond AIE luminogens (AIEgens), with a special focus on new properties in addition to luminesce endowed by aggregation. We first summarize the chirality that is induced by the aggregation process of prochiral molecules. Then we present the aggregation resulting from the transformation between hydrophilicity and hydrophobicity. After that, the aggregation-induced generation of reactive oxygen species (ROS) is described and the regulation of the aggregation state for tuning the ROS generation efficiency is discussed. We also discuss how to achieve the switch between radiative decay and nonradiative decay through the regulation of the aggregation extent to afford luminescence and photothermy (photothermal effect), respectively. Additionally, different strategies to accelerate th...

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“…Such products have been developed for use in energy storage (Sun et al, 2014;Liu et al, 2021b;Liu et al, 2021c;Xu et al, 2021), catalysis (An et al, 2019;, sensing (Du et al, 2019a;Zhang et al, 2021a;Miao et al, 2021;Yuan et al, 2021;Zhao et al, 2021;Liu et al, 2022) and biomedicine (Du et al, 2019a;Liu et al, 2020), etc. Biomass resources have gradually become one of the main sources of photoluminescent chemicals because they are abundant, inexpensive, easy availability and have good sustainability (Ge et al, 2021a;Cai et al, 2021;Wareing et al, 2021;Yu et al, 2021). Photoluminescent materials derived from biomass resources include fluorescent organic molecules (He et al, 2018;Han et al, 2020) and carbon dots (Ge et al, 2021b;Ge et al, 2021c;Li et al, 2021b;Tan et al, 2021); the latter have been widely studied because they are non-toxic, have good biocompatibility and optical tunability and also demonstrate strong photoluminescence (Su et al, 2020;Wang et al, 2021a;Zhang et al, 2021b).…”

Section: Introductionmentioning

confidence: 99%

One-step Synthesis of Biomass-Based Carbon Dots for Detection of Metal Ions and Cell Imaging

et al. 2022

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Biomass-based carbon dots (Bio-CDs) were prepared from dehydroabietic acid using a one-step hydrothermal process. Characterization by TEM, XPS and FTIR spectroscopy showed that the Bio-CDs are spherical nanoparticles containing mainly C, N and O elements, with functional groups such as amino and carbonyl groups on their surface. The optical properties of the Bio-CDs were studied in detail. A solution of Bio-CDs exhibited excitation-dependent blue fluorescence emission. The solution showed excellent photostability under ultraviolet light and the fluorescence intensity could be enhanced by decreasing the temperature. The intensity of fluorescence emission of the solution was essentially unchanged over the pH range 3.91–8.69, and in the presence of different anions and cations, other than Fe3+ and Pb2+. Fe3+ and Pb2+ ions, respectively, quenched and enhanced the intensity of the fluorescence emission of the solution, allowing sensitive and selective detection of Fe3+ (LOD = 2.33 μM, Em = 437 nm) and of Pb2+ (LOD = 0.27 μM, Em = 437 nm and LOD = 0.33 μM, Em = 500 nm). As a further demonstration of potential applications, the Bio-CDs were shown to have low cytotoxicity and to stain cell nuclei as effectively as the commonly used nuclear stain 4′,6-diamino-2-phenylindole (DAPI), demonstrating their promise in the field of cell imaging.

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BioAIEgens derived from rosin: how does molecular motion affect their photophysical processes in solid state?

Cited by 82 publications

References 53 publications

Temperature-Responsive Photoluminescence and Elastic Properties of 1D Lead Halide Perovskites R- and S-(Methylbenzylamine)PbBr3

Temperature-Responsive Photoluminescence and Elastic Properties of 1D Lead Halide Perovskites R- and S-(Methylbenzylamine)PbBr3

Aggregate Materials beyond AIEgens

One-step Synthesis of Biomass-Based Carbon Dots for Detection of Metal Ions and Cell Imaging

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