π* ← π systems in the electronic absorption spectra of some trisubstituted benzenes

Vibrational spectra and first-order molecular hyperpolarizabilities of p-hydroxybenzaldehyde dimer

“…The weak IR bands at 2879 and 2789 cm À1 may be considered as first overtone of 1452 cm À1 and combination band (1452 + 1387) cm À1 , respectively. The shift of band position can be attributed to the possible interactions of C-H stretching mode with the overtone of C-H in-plane bending, which reduces the intensity of C-H stretching band via Fermi resonance [10][11][12][13][14][15][16][17][18][19][20]. Therefore we confirmed that these two bands are the partners in the C-H doublet of PHBA.…”

“…The benzaldehyde and substituted benzaldehydes have been subjected to various spectroscopic studies [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. Mono-, halo-, methoxy and ethoxy-substituted benzaldehydes, among others, have attracted the attention of the spectroscopists.…”

Emission spectra of 3,4- and 3,5-difluorobenzaldehyde vapors: Conformer-specific phosphorescence from the 3,4-derivative

“…The absence of any impurity emission in glassy matrix at 77 K and verification that the excitation spectra of the vapor samples agreed well with the corresponding absorption spectra suggest that the purified samples were sufficiently pure for the experiment. Further, it was confirmed that the absorption spectrum of purified 3,4-DFB agreed with that reported previously [6]. The samples were carefully degassed in an all-glass made vacuum system equipped with a diffusion pump.…”

Precise Spectroscopic [IR, Raman and NMR] Investigation and Gaussian Hybrid Computational Analysis (UV-Visible, NIR, MEP Maps and Kubo Gap) on L-Valine

“…In this case, the C-H stretching vibration is found at 2970 and 2930 cm -1 in IR and Raman spectra. The C-H in plane bending mode (CH rocking) and out of plane bending mode (CH wagging) are expected in the region 1420-1370 cm −1 and 1100-900 cm -1 for aldehyde and its derivatives [33][34][35]. In L-Valine, the in plane and out of plane bending vibrational modes are observed at 1350 and 1325 cm -1 and 870 and 850 cm -1 .…”