The latter effect is critical to the modification of electronic structure of Pt, where gaining electrons from Pd is expected to cause a downshift in Pt d-band center relative to the Fermi level [22, 45].
It is also noted that the SB C=N stretch frequency upshifts to 1652 cm 1 even though neutralization of this homologous residue in other microbial rhodopsins causes a downshift.
Because all of these substitutions are expected to cause a downshift of the νC=N in analogy with BR, this result establishes the assignment of the negative 1651 cm 1 band to the C=N stretch mode [as opposed, for example, to an amide I band (see below)].
The Raman studies show that besides the local heating effect that causes a substantial downshift, TO modes upshift because of compressive strain in all the NCs, while the phonon confinement-induced downshift is observed for NCs with average size below 10 nm.
As indicated by the work on GaAs and InAs NWs grown on SiO2 and GaAs substrates, defects can cause a frequency downshift and line-width broadening to the phonon peaks [8].
To further confirm the assignment of the 1646 cm 1 band in CaChR1, D H exchange was performed, which is expected to cause a frequency downshift.
MO calculation reveals that the SS bond in a 1,2,4-dithiazolium ring of PPDTA causes a gap narrowing and a downshift of HOMO and LUMO levels, being consistent with the electrochemical experiment.
going up a slight hill, a light pressure on the gas caused it to downshift with a huge clunk.
As expected, H D exchange causes a complete disappearance of these bands with their downshift and appearance in the OD stretching region at 2682 and 2677 cm 1.
For example, the primary counterion, Asp85, in BR undergoes a protonation below pH 3 that causes a pronounced red shift in λmax from 570 to ∼600 nm and a downshift in νC=C from 1527 to 1518 cm 1.
