Structure-directing effects in (110)-layered hybrid perovskites containing two distinct organic moieties

The hybrid perovskites (ImH)(GuH)PbBr 4 and (TzH)(GuH)PbBr 4 (ImH + = imidazolium, GuH + = guanidinium, TzH + = 1,2,4-triazolium) both adopt (110)-oriented layer structures. However, the GuH + cation adopts differing crystallographic sites in the two structures (intra-layer versus inter-layer); this...

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Published inChemical communications (Cambridge, England) Vol. 55; no. 67; pp. 9935 - 9938
Main Authors Guo, Yuan-Yuan, McNulty, Jason A, Mica, Natalie A, Samuel, Ifor D. W, Slawin, Alexandra M. Z, Bühl, Michael, Lightfoot, Philip
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 15.08.2019
Subjects
Cations
Crystallography
Hydrogen bonding
Perovskites
Single crystals
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Summary:The hybrid perovskites (ImH)(GuH)PbBr 4 and (TzH)(GuH)PbBr 4 (ImH + = imidazolium, GuH + = guanidinium, TzH + = 1,2,4-triazolium) both adopt (110)-oriented layer structures. However, the GuH + cation adopts differing crystallographic sites in the two structures (intra-layer versus inter-layer); this is discussed in terms of the sizes of the organic cations and their hydrogen-bonding preferences. The combination of two similar 'disc-shaped' organo-cations is shown to template the formation of (110)-cut layered perovskites of stoichiometry AA′BX 4 .
Bibliography:For ESI and crystallographic data in CIF or other electronic format see DOI
10.1039/c9cc04964a
Electronic supplementary information (ESI) available: Synthesis, single crystal and powder XRD, distortion mode analysis, crystallographic data (CIF). CCDC
1917733-1917736
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1359-7345
1364-548X
DOI:10.1039/c9cc04964a