Domino-like multi-emissions across red and near infrared from solid-state 2-/2,6-aryl substituted BODIPY dyes

Dan Tian, Fen Qi, Huili Ma, Xiaoqing Wang, Yue Pan, Runfeng Chen, Zhen Shen (), Zhipeng Liu (), Ling Huang () and Wei Huang
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Dan Tian: Nanjing Tech University (NanjingTech)
Fen Qi: Nanjing Tech University (NanjingTech)
Huili Ma: Nanjing Tech University (NanjingTech)
Xiaoqing Wang: Nanjing Tech University (NanjingTech)
Yue Pan: Nanjing Tech University (NanjingTech)
Runfeng Chen: Nanjing University of Posts & Telecommunications
Zhen Shen: Nanjing University
Zhipeng Liu: Nanjing Tech University (NanjingTech)
Ling Huang: Nanjing Tech University (NanjingTech)
Wei Huang: Nanjing Tech University (NanjingTech)

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract Considerable achievements on multiple emission capabilities and tunable wavelengths have been obtained in inorganic luminescent materials. However, the development of organic counterparts remains a grand challenge. Herein we report a series of 2-/2,6-aryl substituted boron-dipyrromethene dyes with wide-range and multi-fluorescence emissions across red and near infrared in their aggregation states. Experimental data of X-ray diffraction, UV–vis absorption, and room temperature fluorescence spectra have proved the multiple excitation and easy-adjustable emission features in aggregated boron-dipyrromethene dyes. Temperature-dependent and time-resolved fluorescence studies have indicated a successive energy transfer from high to step-wisely lower-located energy levels that correspond to different excitation states of aggregates. Consistent quantum chemical calculation results have proposed possible aggregation modes of boron-dipyrromethene dyes to further support the above-described scenario. Thus, this study greatly enriches the fundamental recognition of conventional boron-dipyrromethene dyes by illustrating the relationships between multiple emission behaviors and the aggregation states of boron-dipyrromethene molecules.

Date: 2018
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DOI: 10.1038/s41467-018-05040-8

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