Visible spectrum of titanium dioxide.
The electronic spectrum in the region 17 500 cm(-1) to 18 850 cm(-1) of a cold molecular beam of TiO(2) has been investigated using laser induced fluorescence (LIF) and mass-resolved resonance enhanced multi-photoionization (REMPI) spectroscopy. Bands at 18 412 cm(-1), 18 470 cm(-1) and 18 655 cm(-1) were recorded at a resolution of 35 MHz, rotationally analyzed, and assigned as the Ã(1)B(2) (0,1,2) ←X[combining tilde](1)A(1) (0,0,0), Ã(1)B(2) (1,0,0) ←X[combining tilde](1)A(1) (0,0,0) and Ã(1)B(2) (1,1,0) ←X[combining tilde](1)A(1) (0,0,0) transitions. The dispersed fluorescence from the Ã(1)B(2) (0,1,2) and Ã(1)B(2) (1,0,0) levels were combined with previous results to produce an improved set of vibrational parameters for the X[combining tilde](1)A(1) state. The optical Stark effect in the Ã(1)B(2) (0,1,2) ←X[combining tilde](1)A(1) (0,0,0) and Ã(1)B(2) (1,0,0) ←X[combining tilde](1)A(1) (0,0,0) bands were recorded and combined with earlier results for Ã(1)B(2) (1,1,0) ←X[combining tilde](1)A(1) (0,0,0) to determine the permanent electric dipole moment for these states. The origin and harmonic vibrational constants for the Ã(1)B(2) state are determined to be: T(000) = 17 593(5) cm(-1), ω(1) = 876(3) cm(-1), ω(2) = 184(1) cm(-1), and ω(3) = 316(2) cm(-1). A normal coordinate analysis was performed and Franck-Condon factors calculated.
Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287-1604, USA.
Xiujuan
X
Zhuang
Anh
A
Le
Timothy C
TC
Steimle
Ramya
R
Nagarajan
Varun
V
Gupta
John P
JP
Maier