About

SolvatoChrom is a web tool for studying the influence of solvent parameters on dye photophysical characteristics.

With this service, you can perform:

Simple Linear Regression (SLR) for all solvation parameters
Multiple Linear Regression (MLR) for:
- The four-parameter Catalán equation
- The three-parameter Catalán equation
- The three-parameter Kamlet-Taft equation

Statistical analyses are implemented using scikit-learn.

You can learn more about the SolvatoChrom web tool in our article:

A.A. Ksenofontov, E.V. Antina, One-Click solvatochromism Analysis: The SolvatoChrom web tool, Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy (2025) 126455. https://doi.org/10.1016/j.saa.2025.126455

Citing SolvatoChrom web tool:

A.A. Ksenofontov, E.V. Antina, One-Click solvatochromism Analysis: The SolvatoChrom web tool, Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy (2025) 126455. https://doi.org/10.1016/j.saa.2025.126455

Solvation Parameters

Our solvent parameter database contains over 1,059 parameters for 75 solvents, including:

Dielectric constants (ε) and refractive index (n_D)
Density (ρ) in g/mL
Dipole moments (µ) in D
Solvent polarity (E_T(30))
Catalán solvent parameters
Kamlet-Taft parameters
Hansen solubility parameters
Orientational polarizability (Δf) (Lippert-Mataga equation)

Missing a parameter or solvent? Contact us

How to Use

Using the slider, choose your preferred interface: Step-by-step or Table mode.

Step-by-step

Select solvents (multiple selection available)
Choose number of photophysical parameters
Click "Create table"
Enter parameter names and values
Click "Analyze" to get results
Download results in Excel and/or PDF format

Table Mode

In this mode, you can upload your own data table or create one in the editor.

To upload a table:

Select Upload XLSX file and click on Choose File.
To load and analyze data from your file, click the Load and Analyze button.
Note: Your file must be formatted according to the template, which is available by clicking Download example file.

To create a table:

Enter the number of rows (solvents) and columns (parameters), then click Create table.
Enter all necessary data: choose the names for the solvents and parameters, and add the corresponding values. If you need to add or delete rows or columns, use the respective buttons: Add Row, Add Column, and Actions.
Click Analyze to get your results.
Download the results in Excel and/or PDF format.