Definition of bathochromic in English:



  • Relating to or denoting a shift of the absorption spectrum of a compound towards longer wavelengths.

    • ‘In particular, the dianion absorption spectrum exhibits a substantial bathochromic shift and a reduction in bandwidth in solvent-water mixtures containing aprotic solvents as the hydrogen-bonding environment is decreased.’
    • ‘The physical origins of this bathochromic shift are described in detail in molecular spectroscopy texts.’
    • ‘Furthermore, the substitution reactions resulted in small bathochromic shifts in the absorption spectra.’
    • ‘After photoisomerization, a bathochromic (red-shifted) intermediate, called K, forms in 3 ps.’
    • ‘In the case of the model compound of tyrosine NAYA, a small bathochromic shift of 2 nm in the emission spectrum from dioxane to water was observed.’


Late 19th century: from Greek bathos ‘depth’ + khrōma ‘colour’ + -ic.