Designer Peptides: A Treasure Trove for Self‐Assembled Functional Materials

Haridas, V.; Jawla, Sagar

doi:10.1002/9783527834044.ch31

Supramolecular Nanotechnology 2023

DOI: 10.1002/9783527834044.ch31

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Designer Peptides: A Treasure Trove for Self‐Assembled Functional Materials

V. Haridas

Sagar Jawla

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2024

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Cited by 3 publications

References 68 publications

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Designer Helical Fibers and Tubes: Self‐assembling Hybrid Peptides via Leu/Ile‐Phe Zipper

Dutta,

Haridas

2024

ChemBioChem

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Here, we present a family of simple peptides that show diverse self‐assembling behaviors. We used aliphatic (Leu/Ile) and aromatic (Phe) amino acids to delineate our design. The design consists of phenylene urea at the N‐terminus of the peptide. The urea peptides with sequence Phe‐LeuOMe (1) or Phe‐IleOMe (2) associate to form polygonal peptide tubes via zipper arrangements, supported by microscopic and single crystal X‐ray diffraction studies. The peptide with Phe placed away from the phenylene urea (3 and 4), showed fibrous assembly. All the peptides showed autofluorescence and red edge excitation behavior upon self‐assembly.

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Designer Helical Fibers and Tubes: Self‐assembling Hybrid Peptides via Leu/Ile‐Phe Zipper

Dutta,

Haridas

2024

ChemBioChem

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Large Local Internal Stress in an Elastically Bent Molecular Crystal Revealed by Raman Shifts

Rahman,

Mondal,

Modak

et al. 2024

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The structural dynamics involved in the mechanical flexibility of molecular crystals and the internal stress in such flexible materials remain obscure. Here, the study reports an elastically bending lipidated molecular crystal that shows systematic shifts in characteristic vibrational frequencies across the bent crystal region – revealing the nature of structural changes during bending and the local internal stress distribution. The blueshifts in the bond stretching modes (such as C═O and C−H modes) in the inner arc region and redshifts in the outer arc region of the bent crystals observed via micro‐Raman mapping are counterintuitive to the bending models based on intermolecular hydrogen bonds. Correlating these shifts with the trends observed from high‐pressure Raman studies on the crystal reveals the local stress difference between the inner arc and outer arc regions of the bent crystal to be ≈2 GPa, more than an order of magnitude higher than the previously proposed value in elastically bending crystals. High local internal stress can have direct ramifications on the properties of molecular piezoelectric energy harvesters, actuators, semiconductors, and flexible optoelectronic materials.

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Designer pseudopeptides: autofluorescent polygonal tubes via Phe-zipper and triple helix

Haridas,

Maurya,

Dutta

2024

Chem. Sci.

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Designer Peptides: A Treasure Trove for Self‐Assembled Functional Materials

Cited by 3 publications

References 68 publications

Designer Helical Fibers and Tubes: Self‐assembling Hybrid Peptides via Leu/Ile‐Phe Zipper

Designer Helical Fibers and Tubes: Self‐assembling Hybrid Peptides via Leu/Ile‐Phe Zipper

Large Local Internal Stress in an Elastically Bent Molecular Crystal Revealed by Raman Shifts

Designer pseudopeptides: autofluorescent polygonal tubes via Phe-zipper and triple helix

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