107144-90-1Relevant articles and documents
Quantitative investigations of the aggregation behaviour of hydrophobic anilino squeraine dyes through UV/vis spectroscopy and dynamic light scattering
Wojatyk,McKerrow,Kazmaier,Buncel
, p. 903 - 912 (1999)
In continuing studies of the aggregation behaviour of squaraine dyes in DMSO-water mixtures, we have examined a series of symmetrical anilino-based squaraines with increasing N-alkyl chain length (n-butyl, n-octyl, and n-dodecyl). The aggregation behaviour was assessed through UV/vis spectroscopic and Dynamic Light Scattering (DLS) studies with quantitative interpretation based on exciton theory. This class of N-alkyl squaraines forms two distinct solution aggregates, Type J and Type H, depending on the composition of the DMSO-water medium. DLS measurement of the aggregates in the Type J and Type H morphologies showed that (i) the particle diameter increased with increasing hydrophobicity; (ii) DMSO has a large effect on the aggregate size; (iii) Type J aggregates are of equal dimensions with Type H aggregates. Moreover, even though as the DMSO-water solvent composition is varied the UV/vis spectra of Type H and Type J aggregates remained unchanged, the number of molecules comprising each aggregate varies widely. It is proposed that the dynamic conversion (J → H) results from intramolecular reorganization of individual molecules within the aggregate. Quantification of aggregation through DLS has further developed the 'kinetic' versus 'thermodynamic' control model of dye aggregation.
Fluorescent membrane probes based on a coumarin-thiazole scaffold
Pajk, Stane,Garvas, Maja,?trancar, Janez
, p. 668 - 674 (2019/10/14)
Biological functions of cell membranes and their correlation to the heterogeneity of the latter’s lipid composition are still poorly understood. Fluorescence provides one of the most versatile tools for studying biological membranes. However, few bright a
