1：Experimental Design and Method Selection

The method is based on the formation of an anionic platform of J-aggregates of magnesium complexes of thiamonomethinecyanines in an aqueous solution followed by the matrix synthesis of J-aggregates of two cationic trimethinecyanines on the surface of the platform.

2：Sample Selection and Data Sources

Four polymethine dyes were studied, two of which are anionic dyes absorbing light in the blue spectral range, and the other two are cationic dyes absorbing light in the green and red spectral ranges.

3：List of Experimental Equipment and Materials

Millipore Milli-Q3 Direct UV water purification system, GR-202 A&D electronic microanalytical balance, Ocean Optics spectrophotometer USB2000+, Cary Eclipse spectrofluorimeter, Mechanika Precyzyjna M-317b centrifuge, Zetasizer Nano ZS instrument, Coherent Radius 405 semiconductor laser, Imagine Spectrograph Prinston Instruments Acton SP2500 spectrograph, Tektronix TDS 3032B digital oscillograph, PE25-S Ophir Optronics light-pulse energy meter, Sourcemeter Keithley 2400 measurement chamber.

4：Experimental Procedures and Operational Workflow

The synthesis involved the preparation of aqueous solutions of dyes, addition of magnesium sulfate to form J-aggregates, and subsequent addition of cationic dyes to form multichromic J-aggregates. The process was monitored spectrophotometrically.

5：Data Analysis Methods

Absorption and luminescence measurements were carried out using spectrophotometers and spectrofluorimeters. Photoelectric measurements were performed using a setup for testing the photoelectric properties of organic photoelements.