Nagoya University

Chenguang Wang

Shigehiro Yamaguchi

Aiko Naka

Aiko Fukazawa

Eriko Yamaguchi

Masayasu Taki

A phosphole compound represented by the formula (wherein Arand Arare the same or different, and represent an optionally substituted aromatic hydrocarbon ring or an optionally substituted heteroaromatic ring; Arrepresents a divalent &#x3c0;-conjugated unit; Rrepresents an optionally substituted alkyl group, an optionally substituted cycloalkyl group, an optionally substituted aryl group, or an optionally substituted heteroaryl group; Rand Rare the same or different, and represent a hydrogen atom, an optionally substituted alkyl group, an optionally substituted cycloalkyl group, an optionally substituted aryl group, or an optionally substituted heteroaryl group; and Z represents a reactive group) can provide a fluorescent dye capable of maintaining a high fluorescence quantum yield irrespective of solvent polarity, and providing an improved fluorescence quantum yield and light resistance even in environments containing large amounts of water.

Phosphole compound

The following formula is an example of a phosphole compound of the present invention. The phosphole compound of the present invention has the characteristic of maintaining a high fluorescence quantum yield in a wide range of solvents from low-polarity solvents to high-polarity solvents, as well as the characteristic in which the fluorescence wavelength shifts to the longer wavelength side as the polarity of the solvent increases. Because of these characteristics, the phosphole compound of the present invention is expected to be used, for example, for quantitatively determining the polarity in the environment therearound by using the absorption wavelength and fluorescence wavelength thereof, or used as a new fluorescent probe dye or a highly efficient luminescent material in organic electronic devices. 

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Nagoya, Japan

Chenguang Wang