# Derivatives of 1-(2-Pyridyl)-3-pyrazolecarboxylic Acids as Ligands for Binding f-Elements

## TL;DR

This paper describes the synthesis of new carboxylic acid derivatives and their ability to form complexes with f-element salts.

## Contribution

The study introduces new ligands for f-element binding and analyzes their complex composition and luminescence properties.

## Key findings

- Amides of 1-(2-pyridyl)-5-arylpyrazole-3-carboxylic acids were successfully synthesized.
- Complexes with 4f- and 5f-element salts were formed and analyzed in various states.
- Luminescence parameters of europium complexes in solution were determined.

## Abstract

A series of amides of 1-(2-pyridyl)-5-arylpyrazole-3-carboxylic acids has been synthesized. Complexes of synthesized ligands with salts of 4f- and 5f-elements were obtained. The composition of the complexes in the gas phase, solution, and solid state has been studied. The luminescence parameters of europium complexes in solution have been determined.