Structural, optical, and theoretical studies of a thermochromic organic crystal with reversibly variable second harmonic generation

Michel Sliwa, Arnaud Spangenberg, Isabelle Malfant, Pascal G. Lacroix, Rémi Métivier, Robert B. Pansu, Keitaro Nakatani

Research output: Contribution to journalArticlepeer-review

Abstract

N-(3,5-Ditert-butylsalicylidene)-2-aminopyridine (1) exhibits bulk second harmonic generation (SHG) activity (2 vs urea). X-ray diffraction measurements show a non-centrosymmetric structure (P32). Experimental data of polarization-dependent SHG match the theoretical calculations on the basis of the crystallographic data. 1 is also thermochromic in the crystalline state, and SHG at 120 K is 4 times as high as at room temperature. Comparison is made with the isostructural isomer, N-(3,5-ditert-butylsalicylidene) -4-aminopyridine (2), which exhibits reversible photoinduced SHG variations.

Original languageEnglish
Pages (from-to)4062-4068
Number of pages7
JournalChemistry of Materials
Volume20
Issue number12
DOIs
Publication statusPublished - 24 Jun 2008
Externally publishedYes

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