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Articles you may be interested inFlexible microwave absorbers based on barium hexaferrite, carbon black, and nitrile rubber for 2-12GHz applications Absolute vibrational and electronic cross sections for low-energy electron (2-12 eV) scattering from condensed pyrimidine J. Chem. Phys. 122, 094701 (2005); 10.1063/1.1854121 μm InGaAs-InGaAlAs-InP diode lasers grown in solid-source molecular-beam epitaxyWe have obtained well resolved optical spectra of a simple, methyl substituted hexaene at 4.2 K. These spectra provide detailed information on the vibronic levels associated with the ground (I lAg) and first excited (2 lAg) singlet electronic states. The strongest vibronic feature, due to a totally symmetric CC double bond stretch, shifts from 1576 cm-I in the l1A. state to 1779 cm-I in the 2 IA. state. This shift, not accounted for by current theoretical descriptions of polyene electronic states at the crude adiabatic level, may be rationalized as a manifestation of vibronic coupling between the ground and first excited singlet states.4

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