Restriction of Intramolecular Motion(RIM): Investigating AIE Mechanism from Experimental and Theoretical Studies

Zhang, Jianyu; Zhang, Haoke; Lam, Jacky W. Y.; Tang, Ben Zhong

doi:10.1007/s40242-021-0381-6

Cited by 118 publications

(72 citation statements)

References 104 publications

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“…RIM explains fluorescence quenching in terms of RIR and intramolecular rotation vibration (RIV). [23][24][25][26] Applying RIM as a designing principle, a bunch of new facile synthesized AIEgens shows excellent photophysical properties as well as great potential in analytical chemistry and biological application. [27][28][29] However, AIE is a common term to describe a phenomenon which occur as a consequence of manifold processes such as J-type aggregates, RIR, RIV, or E/Z isomerization.…”

Section: Insights Into Optical Probes Based On Aggregation-induced Emission: From Restriction Of Intramolecular Motions To Dark Statementioning

confidence: 99%

Insights into Optical Probes Based on Aggregation‐Induced Emission: from Restriction of Intramolecular Motions to Dark State

Huang

Ding

et al. 2021

Advanced Optical Materials

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Section: Insights Into Optical Probes Based On Aggregation-induced Emission: From Restriction Of Intramolecular Motions To Dark Statementioning

confidence: 99%

Insights into Optical Probes Based on Aggregation‐Induced Emission: from Restriction of Intramolecular Motions to Dark State

Huang

Ding

et al. 2021

Advanced Optical Materials

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“…However, the electron-withdrawing groups in TPM-CN and TPM-NO2 decentralized the electrons of phenyl rings and destabilized the intramolecular TSC, resulting in low emission efficiency. On the other hand, the restriction of intramolecular motions (RIM), 30 which served as the mechanism of AIE phenomenon, helped to stabilize the preferential conformation for TSC in the aggregate state. The synergistic effect between TSC and RIM generated efficient clusteroluminescence of TPM and its derivatives.…”

Section: Introductionmentioning

confidence: 99%

How to Manipulate Through-Space Conjugation and Clusteroluminescence of Simple AIEgens with Isolated Phenyl Rings

Zhang

et al. 2021

J. Am. Chem. Soc.

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131

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Apart from the traditional through-bond conjugation (TBC), through-space conjugation (TSC) is gradually proved as another important interaction in photophysical processes, especially for the recent observation of clusteroluminescence from nonconjugated molecules. However, unlike TBC in conjugated chromophores, it is still challenging to manipulate TSC and clusteroluminescence. Herein, simple and nonconjugated triphenylmethane (TPM) and its derivatives with electron-donating and electron-withdrawing groups were synthesized, and their photophysical properties were systematically studied. TPM was characterized with visible clusteroluminescence due to the intramolecular TSC. Experimental and theoretical results showed that the introduction of electron-donating groups into TPM could red-shift the wavelength and increase the efficiency of clusteroluminescence simultaneously, due to the increased electronic density and stabilization of TSC. However, TPM derivatives with electron-withdrawing groups showed inefficient or even quenched clusteroluminescence caused by the vigorous excited-state intramolecular motion and intermolecular photoinduced electron transfer process. This work provides a reliable strategy to manipulate TSC and clusteroluminescence.

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“…The three peaks spread from 400 to 500 nm were assigned to the vibrational emissions of the TPPGPA monomer. According to the mechanism of restriction of intramolecular motion (RIM), 53 the non-emissive nature of TPPGPA in DCM solution was attributed to molecular motions, which allowed the excited state to decay nonradiatively. The PL of TPPGPA was further studied in dimethylformamide (DMF)/water mixtures to evaluate the aggregation effect on the light emission process.…”

Section: Page 4 Of 21 Ccs Chemistrymentioning

confidence: 99%

Metallophilicity-Induced Clusterization: Single-Component White-Light Clusteroluminescence with Stimulus Response

et al. 2022

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Materials showing metallophilic interactions continue to attract considerable theoretical and experimental attention largely because of their unusual and unanticipated photophysical behavior as well as their unique stimuli-responsive behavior in the aggregate or solid-state. Metallophilic interactions are mostly found between metals with either identical (d 10 -d 10 ) or different (s 2 -d 8 , d 8 -d ) configurations. Among various metallophilic interactions, aurophilic interactions (Au•••Au) are well-known and widely reported. In this study, a new phosphorescent gold(I) complex, [(CF 3 Ph) 3 PAuC≡CPh] (TPPGPA) was reported. The crystal structure of TPPGPA demonstrated the formation of trimers caused by intermolecular aurophilic interactions. These trimeric crystals showed an efficient and nearly pure whitelight emission with Commission Internationale de L'Eclairage 1931 chromaticity coordinates of (0.33, 0.34) at ambient conditions. Moreover, TPPGPA displayed fascinating mechanochromic and thermochromic luminescence properties in the crystalline state. The application of TPPGPA in temperature-responsive white-light illumination was also successfully demonstrated. The molecular packing and temperature-dependent modulation of the aurophilic interactions were subtly taken as a functional relationship of the experimental correlation with emission wavelength and intensity. It is anticipated that the present results will provide new insights into aurophilic interactions and provide a molecular design strategy for the construction of intelligent and stimuli-responsive gold(I) complex-based luminescent materials.

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Restriction of Intramolecular Motion(RIM): Investigating AIE Mechanism from Experimental and Theoretical Studies

Cited by 118 publications

References 104 publications

Insights into Optical Probes Based on Aggregation‐Induced Emission: from Restriction of Intramolecular Motions to Dark State

Insights into Optical Probes Based on Aggregation‐Induced Emission: from Restriction of Intramolecular Motions to Dark State

How to Manipulate Through-Space Conjugation and Clusteroluminescence of Simple AIEgens with Isolated Phenyl Rings

Metallophilicity-Induced Clusterization: Single-Component White-Light Clusteroluminescence with Stimulus Response

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