scheme1
![Coordination-driven [2+2] metallo-macrocycles isomers: conformational control and photophysical properties](https://image.oaes.cc/cb125064-36d2-409e-a3ce-64c7e564b58e/4997.scheme.1.jpg)
Scheme 1. Self-assembly of metallacycles SA and SB (energy-minimized structures). Carbon atoms of ligands LA and LB are blue, carbon atoms of acceptor 1 are green, nitrogen atoms are dark blue, oxygen atoms are red, phosphorus atoms are pink, and platinum atoms are grey.