Hydrogen bonded lambda-shaped packing motif based on 4-nitrophenylhydrazones: A promising design tool for engineering acentric crystals

Ricky M S WONG, Volker Gramlich, Christian Bosshard*, Peter Günter

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

Two newly developed 4-nitrophenylhydrazone derivatives, 4-diethylaminobenzaldehyde 4-nitrophenylhydrazone, DEANPH, and 5-bromothiophene-2-carbaldehyde 4-nitrophenylhydrazone, BTNPH, which exhibit very strong second harmonic signals that are three orders of magnitude greater than that of the urea standard were investigated by single crystal X-ray analysis. The structural comparison with three other strongly optically nonlinear hydrazones revealed that the hydrogen bond-directed lambda-shaped supramolecular assemblies are the key and fundamental bases of all these non-centrosymmetric crystal packings. The high occurrence within this class of acentric crystals is likely due to this hydrogen bonded lambda-shaped packing motif. Since the chromophores are preferentially arranged in a lambda-shape, the acentric crystals are generally optimized for second-order nonlinear optical effects such as second harmonic generation.

Original languageEnglish
Pages (from-to)2021-2026
Number of pages6
JournalJournal of Materials Chemistry
Volume7
Issue number10
DOIs
Publication statusPublished - Oct 1997

Scopus Subject Areas

  • Chemistry(all)
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'Hydrogen bonded lambda-shaped packing motif based on 4-nitrophenylhydrazones: A promising design tool for engineering acentric crystals'. Together they form a unique fingerprint.

Cite this