Penta-kis(l-prolinium) dodeca-tungsto-borate trihydrate

Area of Science:

• Materials Science
• Inorganic Chemistry
• Crystallography

Background:

• Polyoxometalates (POMs) are versatile inorganic clusters with diverse applications.
• Organic-inorganic hybrid compounds offer tunable properties by combining POMs with organic moieties.
• The α-Keggin structure is a fundamental and widely studied POM framework.

Purpose of the Study:

• To synthesize and characterize a novel polyoxometalate-based organic-inorganic hybrid compound.
• To investigate the structural features of the polyoxoanion and its interactions with organic cations.
• To elucidate the supramolecular assembly driven by hydrogen bonding.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
• Analysis of bond lengths, bond angles, and hydrogen bonding interactions was performed.
• The formation of the three-dimensional supramolecular network was studied.

Main Results:

• The compound (C(5)H(10)NO(2))(5)[BW(12)O(40)]·3H(2)O was successfully synthesized and characterized.
• The structure comprises an α-Keggin-type [BW(12)O(40)](5-) polyoxoanion, five l-prolinium cations, and three water molecules.
• Extensive N-H⋯O and O-H⋯O hydrogen bonds link the components into a 3D supramolecular architecture.

Conclusions:

• The synthesized compound represents a new example of a polyoxometalate-organic-inorganic hybrid.
• The l-prolinium cations and water molecules play a crucial role in stabilizing the crystal structure through hydrogen bonding.
• The study provides insights into the rational design of complex supramolecular architectures based on POMs.