Melaminium (2-carboxyethyl)(phenyl)phosphinate monohydrate

Area of Science:

• Crystal Engineering
• Supramolecular Chemistry
• Materials Science

Background:

• Cocrystallization is a key method for designing novel materials with tailored properties.
• Melamine and phosphinic acids are versatile building blocks in supramolecular chemistry.

Purpose of the Study:

• To synthesize and characterize a novel cocrystal of melamine and (2-carboxyethyl)(phenyl)phosphinic acid.
• To investigate the self-assembly and structural features of the resulting cocrystal.

Main Methods:

• Single-crystal X-ray diffraction was used to determine the crystal structure.
• Hydrogen bonding and π-π stacking interactions were analyzed.

Main Results:

• A new cocrystal, (maH)(HL)·H2O, was successfully synthesized.
• The crystal structure exhibits a 2D layered architecture composed of cationic melamine ribbons and anionic phosphinate layers.
• The structure is stabilized by hydrogen bonds, electrostatic interactions, and π-π stacking.

Conclusions:

• The study demonstrates the formation of a unique layered cocrystal through the proton transfer from phosphinic acid to melamine.
• The self-assembly process leads to a robust 2D structure with potential applications in materials science.