Rotational band contour analysis in the ùA′-[Xtilde]¹A′ electronic systems of substituted naphthalenes

Abstract

The 0₀ ⁰ bands of the à ¹ A′-[Xtilde] ¹ A′ systems of 1-fluoro, 1-hydroxy and 1-aminonaphthalene have been investigated by rotational band contour analysis. The 0₀ ⁰ bands in 1-fluoro and 1-hydroxynaphthalene are 70 per cent type A and 30 per cent type B, and 75 per cent type A and 25 per cent type B hybrids respectively: the electronic transition moment vector has been rotated by about 15° towards the carbon atom C₃ by the F and OH substituents compared to naphthalene (in which, in the Ã-[Xtilde] system, it is along the long in-plane axis). In 1-aminonaphthalene it seems likely that the 0₀ ⁰ band is predominantly type A, but it could not be observed with sufficient intensity to be able to obtain the excited state rotational constants with any certainty.

Additional information

Notes on contributors

S.N. Thakur

Work done while on leave from Banaras Hindu University, Varanasi, India, which is the present address.