Mechanically triggered reversible stepwise tricolor switching and thermochromism of anthracene-<i>o</i>-carborane dyad

Wu, Xueyan; Guo, Jixi; Cao, Yali; Zhao, Jianzhang; Jia, Wei; Chen, Yi; Jia, Dianzeng

doi:10.1039/c8sc00833g

Cited by 143 publications

(88 citation statements)

References 52 publications

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“…In addition, their emission spectra in solution are analogoust ot hat of Py-NC in dilute solution (Figures 3, S8 and S9), demonstrating that the emission of 1 and 2 at % 400 nm might be originated from the locally excited state. [39] We tentatively speculate that such diversity between Py-NC and gold complexes (1 and 2)m ight be due to the introduction of large groups,s uch as fluorobenzyl-gold(I) groups, which hinder the formation of excimers in the concentrated solution.…”

Section: Photophysical Properties and Dft Calculationmentioning

confidence: 85%

Multiple Photoluminescent Processes from Pyrene Derivatives with Aggregation‐ and Mechano‐Induced Excimer Emission

Wang

Zhang

Yin

et al. 2019

Chemistry An Asian Journal

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Twon ovel pyrene-based isocyanide gold(I)c omplexes have been designed and synthesized.T he different structures lead to distinct and diverse photophysical properties both in solution and in the aggregate state. Multiple photoluminescence, involving monomer emission, locally ex-cited emission and excimer emission, are observed. Notably, an excimer is formed by aggregation in solution and external mechanical stimulation in the solid state, showing aggregation-and mechano-induced excimer emission.Figure 1. Molecule structureo fPy-NC, 1 and 2.[a] Dr.

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Section: Photophysical Properties and Dft Calculationmentioning

confidence: 85%

Multiple Photoluminescent Processes from Pyrene Derivatives with Aggregation‐ and Mechano‐Induced Excimer Emission

Wang

Zhang

Yin

et al. 2019

Chemistry An Asian Journal

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“…Other types of AIE‐active o ‐carborane derivatives are listed in Table and Scheme . Influences on AIE properties were investigated by changing the substituents on the o ‐carborane unit ( 44 – 75 ) . For these compounds, solid‐state excimer emission, single‐molecule white emission, aggregation‐induced electrochemiluminescence, and thermally activated delayed fluorescence were observed.…”

Section: Aggregation‐induced Emissionmentioning

confidence: 99%

Recent Progress in the Development of Solid‐State Luminescent o‐Carboranes with Stimuli Responsivity

2020

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o‐Carborane, a cluster compound containing boron and adjacent carbon atoms, displays intriguing luminescent properties. Recently, compounds containing o‐carborane units were found to show suppressed aggregation‐induced quenching and intense solid‐state emission; they also show potential for the development of stimuli‐responsive luminochromic materials. In this Minireview, we introduce three kinds of fundamental photochemical properties: aggregation‐induced emission, twisted intramolecular charge transfer in crystals, and environment‐sensitive excimer formation in solids. Based on these properties, several types of luminochromism, such as thermos‐, vapo‐, and mechanochromism, have been discovered. Based mainly on results from recent studies, we illustrate these mechanisms as well as unique luminescent behaviors of o‐carborane derivatives.

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“…The interest in carboranes and metallacarboranes as potential units for molecular materials might be endorsed to their remarkable chemical, thermal, and biological stabilities [7][8][9][10][11][12][13][14][15][16][17]. Owing to the properties above of carboranes, they have been used as exceptional building blocks for developing a large variety of fluorescent carborane-containing molecules, in which the cluster is usually linked to a fluorescent π-conjugated organic system, either directly by the C c [18][19][20][21][22][23][24][25][26][27][28][29][30] or through one spacer [7][8][9][31][32][33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Blue Emitting Star-Shaped and Octasilsesquioxane-Based Polyanions Bearing Boron Clusters. Photophysical and Thermal Properties

et al. 2020

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High boron content systems were prepared by the peripheral functionalisation of 1,3,5-triphenylbenzene (TPB) and octavinylsilsesquioxane (OVS) with two different anionic boron clusters: closo-dodecaborate (B12) and cobaltabisdicarbollide (COSAN). TPB was successfully decorated with three cluster units by an oxonium ring-opening reaction, while OVS was bonded to eight clusters by catalysed metathesis cross-coupling. The resulting compounds were spectroscopically characterised, and their solution-state photophysical properties analysed. For TPB, the presence of COSAN dramatically quenches the fluorescence emission (λem = 369 nm; ΦF = 0.8%), while B12-substituted TPB shows an appreciable emission efficiency (λem = 394 nm; ΦF = 12.8%). For octasilsesquioxanes, the presence of either COSAN or B12 seems to be responsible for ∼80 nm bathochromic shift with respect to the core emission, but both cases show low emission fluorescence (ΦF = 1.4–1.8%). In addition, a remarkable improvement of the thermal stability of OVS was observed after its functionalisation with these boron clusters.

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Mechanically triggered reversible stepwise tricolor switching and thermochromism of anthracene-o-carborane dyad

Abstract: A novel single organic molecule–carborane conjugate, CAN, was synthesized in a high yield via a modified nickel-catalyzed cross-coupling reaction incorporating an anthracene unit and an o-carborane moiety.

Cited by 143 publications

References 52 publications

Multiple Photoluminescent Processes from Pyrene Derivatives with Aggregation‐ and Mechano‐Induced Excimer Emission

Multiple Photoluminescent Processes from Pyrene Derivatives with Aggregation‐ and Mechano‐Induced Excimer Emission

Recent Progress in the Development of Solid‐State Luminescent o‐Carboranes with Stimuli Responsivity

Blue Emitting Star-Shaped and Octasilsesquioxane-Based Polyanions Bearing Boron Clusters. Photophysical and Thermal Properties

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