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Synthesis and Fluorescent Properties of Multi-Functionalized C70 Derivatives of C70(OCH3)10[C(COOEt)2] and C70(OCH3)10[C(COOEt)2]2.

ABSTRACT: Due to the partially reduced π-conjugation of the fullerene cage, multi-functionalized fullerene derivatives exhibit remarkable fluorescent properties compared to pristine fullerenes, which have high potential for application in organic light-emitting diodes (OLEDs). In this study two multi-functionalized C70 derivatives, C70(OCH3)10[C(COOEt)2] and C70(OCH3)10[C(COOEt)2]2, with excellent fluorescence properties, were designed and synthesized. Compared with C70(OCH3)10 containing a single kind of functional group, both the C70(OCH3)10[C(COOEt)2] and C70(OCH3)10[C(COOEt)2]2 exhibited enhanced fluorescence properties with blue fluorescence emission. The fluorescence quantum yields of the C70(OCH3)10[C(COOEt)2] and C70(OCH3)10[C(COOEt)2]2 were 1.94% and 2.30%, respectively, which were about ten times higher than that of C70(OCH3)10. The theoretical calculations revealed that the multi-functionalization of the C70 increased the S1-T1 energy gap, reducing the intersystem crossing efficiency, resulting in the higher fluorescence quantum yield of the C70 derivatives. The results indicate that multi-functionalization is a viable strategy to improve the fluorescence of fullerene derivatives.

SUBMITTER: Luan K 

PROVIDER: S-EPMC9099540 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature

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Synthesis and Fluorescent Properties of Multi-Functionalized C<sub>70</sub> Derivatives of C<sub>70</sub>(OCH<sub>3</sub>)<sub>10</sub>[C(COOEt)<sub>2</sub>] and C<sub>70</sub>(OCH<sub>3</sub>)<sub>10</sub>[C(COOEt)<sub>2</sub>]<sub>2</sub>.

Luan Ke K   Wang Lu L   Xie Fang-Fang FF   Chen Bin-Wen BW   Chen Zuo-Chang ZC   Deng Lin-Long LL   Xie Su-Yuan SY   Zheng Lan-Sun LS  

Nanomaterials (Basel, Switzerland) 20220422 9

Due to the partially reduced π-conjugation of the fullerene cage, multi-functionalized fullerene derivatives exhibit remarkable fluorescent properties compared to pristine fullerenes, which have high potential for application in organic light-emitting diodes (OLEDs). In this study two multi-functionalized C<sub>70</sub> derivatives, C<sub>70</sub>(OCH<sub>3</sub>)<sub>10</sub>[C(COOEt)<sub>2</sub>] and C<sub>70</sub>(OCH<sub>3</sub>)<sub>10</sub>[C(COOEt)<sub>2</sub>]<sub>2</sub>, with excellent  ...[more]

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