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. Author manuscript; available in PMC: 2013 Jan 1.
Published in final edited form as: Cryst Growth Des. 2012;12(1):346–353. doi: 10.1021/cg2011502

Scheme 1.

Scheme 1

Schematic representation of proposed attachment mechanisms of L-Alanine functional groups to SIFs and surface engineered SIFs. Please note that L-alanine is a zwitterion molecule in water at pH =5.3, that is, -COOH and NH2 groups are present in COO- and NH3+ form.