I am currently studying the UV-visible spectrum of ethylene using GAUSSIAN-09,. I optimized the ground state(# opt b3lyp/6-31g geom=connectivity# opt b3lyp/6-31g geom=connectivity
) then useused the logfile to calculate the energy without optimizing it (# td=(root=10) b3lyp/6-31g geom=connectivity# td=(root=10) b3lyp/6-31g geom=connectivity
), but when I get the UV-visible spectrum from the log-file using Gauss-viewGaussview I do not know whether it is an absorption or emission spectrum, how can I distinguish between the two from my results?
When
When I try to run an optimization on the excited-state(#p opt freq=savenm td=(nstates=6,root=1) rb3lyp/6-31g(d#p opt freq=savenm td=(nstates=6,root=1) rb3lyp/6-31g(d) geom=connectivity
) geom=connectivity,) I get an error (Error termination request processed by link 9999.Error termination request processed by link 9999
), what. What causes this error? howHow can I solve it? andAnd is it necessary to optimize the structure in the excited state to have the UV-visible spectrum?
How
How can we generate an absorption spectrum and an emission spectrum separately using GAUSSIAN09? What keywords do we have to add?
Can
Can you recommend articles, books, or tutorials about GAUSSIAN software?