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Multipoint Hydrogen Bonding‐Based Molecular Recognition of Amino Acids and Peptide Derivatives in a Porous Metal‐Macrocycle Framework: Residue‐Specificity, Diastereoselectivity, and Conformational Control
Author(s) -
Tashiro Shohei,
Nakata Kosuke,
Hayashi Ryunosuke,
Shionoya Mitsuhiko
Publication year - 2021
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202005803
Subject(s) - hydrogen bond , molecular recognition , peptide , residue (chemistry) , molecule , crystal engineering , porosity , amino acid , chemistry , materials science , crystallography , organic chemistry , biochemistry
Porous crystals have great potential to exert space‐specific functions such as multipoint molecular recognition. In order to rationally enhance the porous function, it is necessary to precisely control molecular recognition event in the pores. Hydrogen bonding is an effective tool for controlling molecular recognition. However, multiple hydrogen bonds, which are essentially the origin of high complementarity and specificity, remain difficult to innovate in porous crystals in an intelligent way. This paper demonstrates molecular recognition of amino acid and peptide derivatives by multipoint hydrogen bonding in a porous metal‐macrocycle framework revealed by single‐crystal X‐ray diffraction analysis. l ‐Serine residues are site‐selectively and residue‐specifically adsorbed on the pore surface via multiple hydrogen bonds. A serine derivative is diastereoselectively recognized on the ( P )‐ or ( M )‐side of the enantiomeric pore surface. Moreover, the conformation of the peptide is highly regulated, incorporating a poly‐ l ‐proline type I helix‐like structure into the pore. These findings will bring deep scientific knowledge to the design of new porous crystals and functions.