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Denoting the shift of an absorption spectrum maximum to a longer wavelength. Opposite of hypsochromic.
[batho- + G. chrōma, color]
References in periodicals archive ?
The free 7-OH was confirmed by a bathochromic shift upon addition of NaOAc compared to MeOH spectrum (ca 11 nm).
The UV data was as compound I except upon addition of NaOAc, compound IV had a bathochromic shift (275 nm) compared with MeOH spectrum (267 nm) indicative to the presence of free 7-OH.
In the case when both the ground state and the excited state of a molecule are nonpolar, a bathochromic shift is generally observed for the corresponding absorption band upon going from a less polarizable solvent to a more polarizable one [14-17].
Indeed, in all mixtures but one there was a bathochromic shift upon going from a less polarizable mixture to a more polarizable mixture.
A systematic bathochromic shift in the position of both bands is observed if DMA is replaced by m-cresol (MC) as the solvent (see Table 1).
Again, the replacement of DMA by MC results in a bathochromic shift of the PL band, the solvent induced spectral changes being however more pronounced than in the case of UV-vis absorption spectra.
For 15 years, we have determined urinary vanillylmandelic acid (VMA) by a method [1] that relies on the reaction of extracted VMA with the diazo derivative of p-nitroaniline to give a pink chromophore; the chromophore undergoes a bathochromic shift in the presence of an aprotic solvent and a base to give a blue derivative with maximum absorbance at 600 nm.