Abstract

BODIPY dyes are unique fluorophores that can be used in numerous application areas because of their interesting photophysical properties such as high molar absorptivity, tunable absorption and emission energies, and high fluorescence quantum yields. They show impressive photophysical property changes upon substitution of functional groups on the main core structure. Exchange of the meso-carbon on dipyrrin core with nitrogen produces an analog class of BODIPY called aza-BODIPY. Up to now, various kinds of BODIPY and aza-BODIPY derivatives have been developed and applied in science and industry. In this chapter, recent studies on photophysical properties of BODIPY derivatives are summarized.

Highlights

  • In the constantly expanding multi-disciplinary science world, fluorescent dyes attract the attention of researchers. 4,4-Difluoro-4-bora-3a,4a-diaza-s-indacene dyes are compounds that are rapidly increasing in importance among fluorescent organic dyes [1]

  • A−D−A possess slightly longer excited-state lifetimes, 42 ps nonradiative decay, and 4.64 ns radiative decay compared to those of D−A, 24 ps nonradiative decay, and 3.95 ns radiative decay. These results show a full picture of the electronic and photophysical properties of D−A and A−D−A that provide contextualization for structure-function relationships between molecules and organic photovoltaic (OPV) devices

  • The photophysical properties of these cyclotriphosphazene compounds were examined in THF solutions. All these heavy atom free compounds indicated very limited fluorescence emission and 1O2 generation owing to the internal charge transfer (ICT) that occurred between BODIPY core and dimethylaminobenzyl groups

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Summary

Introduction

In the constantly expanding multi-disciplinary science world, fluorescent dyes attract the attention of researchers. 4,4-Difluoro-4-bora-3a,4a-diaza-s-indacene (abridged as BODIPY) dyes are compounds that are rapidly increasing in importance among fluorescent organic dyes [1]. BODIPY derivatives absorb strongly visible region, have relatively sharp emission peaks, possess high fluorescence quantum efficiencies Symmetrical BODIPYs (substitution from 1,7- or 3,5-positions) appear to produce more red-shifted absorptions compared. Rotation of pendant components as well as their electron-donating or withdrawing effects on the conjugated core greatly influences both the brightness and absorptive and emissive properties of BODIPY [10]. Due to these excellent photophysical characteristics, BODIPY dyes increase their potential using in different applications such as fluorescent labels for biomolecules and cellular imaging [11–15], light-emitting devices [16–18], drug delivery agents [19–21], photosensitizers [22–24], fluorescent switches [25], chemosensors [26–29], energy transfer cassettes [30–33], and solar cells [34–37]. General photophysical properties of BODIPY and aza-BODIPY derivatives and recent studies on the photophysical properties of these dyes are presented

Photophysical properties of BODIPY dyes
Photophysical properties of aza-BODIPY dyes
Conclusion
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