# Quantum Chemical Stability Analysis of Phthalocyanine Metal One-Dimensional Polymers with Bidentate Ligands

## TL;DR

This paper explores the stability and electronic properties of one-dimensional metal-phthalocyanine polymers with bidentate ligands using quantum chemical methods.

## Contribution

The study introduces a novel computational approach to analyze the structure and electronic properties of metal-phthalocyanine polymers with bidentate ligands.

## Key findings

- DFT calculations confirm a linear, undistorted one-dimensional structure for polymers with bipyridine ligands.
- Molecular orbital analysis reveals a small energy gap in PcZnL monomers, suggesting potential for conductive materials.
- Crystallographic reports support the feasibility of synthesizing these polymers with PcZn and bidentate ligands.

## Abstract

The combination of metal–phthalocyanine complexes and axially coordinated organic molecules into polymer chains presents a significant challenge in the synthesis of hybrid materials. A calculated structure for one-dimensional coordinate polymers with N-donor ligands using ab initio (PM6) and DFT (LanL2Dz) methods is presented. DFT methods have shown that there is a linear, one-dimensional structure without distorted geometry for the two bipyridine ligands. The components of the proposed polymers consist of square-planar Zn complexes of phthalocyanine (PcZn) connected via bridging ligands (L). Electronic properties of the monomer PcZnL of zinc phthalocyanine with bidentate ligands have been analyzed using calculations based on density functional theory (B3LYP6-31G(d,p)). Molecular orbital calculations show that this connection between the metallomacrocycle and the conjugated ligand results in a small energy gap, promising molecularly active materials as conductors. The crystallographic reports indicate that obtaining this kind of polymer with the participation of Pc Zn and bidentate ligands is possible.