Exploiting modularity in template-controlled synthesis: a new linear template to direct reactivity within discrete...

Area of Science:

• Supramolecular chemistry
• Organic solid-state chemistry
• Photochemistry

Background:

• Hydrogen bonding plays a crucial role in molecular self-assembly.
• Controlling molecular alignment in the solid state is key for photochemical reactions.

Purpose of the Study:

• To investigate the co-crystallization of 1,8-naphthalenedicarboxylic acid with trans-1,2-bis(n-pyridyl)ethylene derivatives.
• To explore the formation of discrete molecular assemblies and their templating capabilities.
• To examine the potential for solid-state [2+2] photoreactions within these assemblies.

Main Methods:

• Co-crystallization of 1,8-naphthalenedicarboxylic acid (1,8-nap) with trans-1,2-bis(n-pyridyl)ethylene (n,n'-bpe).
• Structural characterization of the resulting four-component molecular assembly (2(n,n'-bpe).2(1,8-nap)).
• Analysis of hydrogen bonding interactions (O-H...N) and molecular alignment.

Main Results:

• Formation of a discrete four-component molecular assembly, 2(n,n'-bpe).2(1,8-nap).
• The assembly is stabilized by four O-H...N hydrogen bonds.
• 1,8-naphthalenedicarboxylic acid acts as a linear template, directing olefin alignment for [2+2] photoreaction.

Conclusions:

• The study demonstrates successful co-crystallization leading to a well-defined supramolecular structure.
• Hydrogen bonding and templating effects are effective in controlling solid-state molecular arrangement.
• The findings suggest potential for utilizing such assemblies in solid-state photochemistry.