Which basis set will be suitable for a triad's UV-Vis DFT computation?

I tried b3lyp/6-31g(d) which is approx. 100nm red shifted from experimental UV-vis absorption. cam-b3lyp/6-31g(d) is about 100nm blue shifted.wb97xd/6-31g(d) is further blue shifted to 150-200 nm....

03 May 2018 4,348 4 View