Small IR probe molecules have been found to be useful to measure local electric fields in condensed phases and proteins and also to study nucleic acid and protein structure and dynamics by monitoring their vibrational couplings and frequency shifts. However, it is still difficult to accurately describe the vibrational solvatochromic frequency shifts of such IR probes, because the local electric...

The infrared and electronic absorption spectra of a series of new heteroleptic chelated copper (II) complexes [Cu(diamine)(acac)]X that encompass N,N'-1,6-bis(2-bromophenyl)-2,5-diazahexane (diamine), acetylacetonate (acac) and ClO , BPh , PF and BF (X) were studied. The IR, electronic absorption spectra and 4 4 6 4 the molar conductivity of the newly prepared complexes were presented and discu...

Colorful clusters: Silver nanoclusters consisting of only a few atoms exhibit large chemical-environment-responsive shifts of their optical absorption and emission bands, that is, large solvatochromism (see picture). The photophysical characteristics and electrochemiluminescence of the Ag clusters give them remarkable advantages over larger nanoparticles in applications such as molecular sensing.

Donor-acceptor phenylene ethynylene systems containing the 6-methylpyran-2-one group, synthesized via classic or microwave-assisted Sonogashira cross-coupling, exhibit pronounced solvatochromism in fluorescence suggesting a highly polar excited state; 4-[4-(4-N,N-dihexylaminophenylethynyl)phenylethynyl]-6-methylpyran-2-one has a fluorescence quantum yield >0.9 in cyclohexane.

The azo-azomethine dyes were prepared via condensation reaction of 2,4-dichloro-6-methoxy-1,3,5-triazine with azo couled 2-(2-mercaptophenylimino)methyl)-4-(aryldiazenyl)phenol. The UV–vis spectra indicated positive solvatochromism in synthesized compound are dependent on the substitution, solvent, pH and temperature. Some compounds exhibited antibacterial, antioxidant activities.

Hydrogen bonding heavily influences conformations, rate of reactions, and chemical equilibria. The development of a method to monitor hydrogen bonding interactions independent of polarity is challenging as both are linked. We have developed two solvatochromic dyes that detect hydrogen-bond-donating solvents. The unique solvatochromism of the triazine architecture has allowed the development of ...

The effect of solvents on the spectra, absorption, or emission of substances is called solvatochromism; it is due to solute/solvent nonspecific and specific interactions, including dipole/dipole, dipole-induced/dipole, dispersion interactions, and hydrogen bonding. Thermo-solvatochromism refers to the effect of temperature on solvatochromism. The molecular structure of certain substances, polar...

Naphthoquinone pigments 2-methyl-3-(4- or 2-hydroxyphenylthio)-1,4-naphthalenedione show characteristic optical properties in solution and in the solid state. The position of the OH group in the pigment leads to varied optical properties, including a characteristic colour, in the solid state. The pigment with a 2-OH substituent displays solvatochromism in solution, and that with a 4-OH substitu...