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Title: A Zero-Dimensional Organic Seesaw-Shaped Tin Bromide with Highly Efficient Strongly Stokes-Shifted Deep-Red Emission

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [1];  [2];  [3];  [4];  [4];  [4];  [5];  [6]; ORCiD logo [7]
  1. College of Engineering, Tallahassee, FL (United States). Dept. of Chemical and Biomedical Engineering
  2. Beihang Univ., Beijing (China). Dept. of Physics
  3. Materials Science and Engineering Program, Florida State University, Tallahassee FL 32306 USA
  4. Florida State Univ., Tallahassee, FL (United States). Dept. of Chemistry and Biochemistry
  5. Univ. of Southern California, Los Angeles, CA (United States). Dept. of Chemistry
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division, Center for Radiation Detection Materials and Systems
  7. College of Engineering, Tallahassee, FL (United States). Dept. of Chemical and Biomedical Engineering; Beihang Univ., Beijing (China). Dept. of Physics; Florida State Univ., Tallahassee, FL (United States). Dept. of Chemistry and Biochemistry
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The synthesis and characterization is reported of (C9NH20)2SnBr4, a novel organic metal halide hybrid with a zero-dimensional (0D) structure, in which individual seesaw-shaped tin (II) bromide anions (SnBr42-) are co-crystallized with 1-butyl-1-methylpyrrolidinium cations (C9NH20+). Upon photoexcitation, the bulk crystals exhibit a highly efficient broadband deep-red emission peaked at 695 nm, with a large Stokes shift of 332 nm and a high quantum efficiency of around 46 %. Furthermore, the unique photophysical properties of this hybrid material are attributed to two major factors: 1) the 0D structure allowing the bulk crystals to exhibit the intrinsic properties of individual SnBr42- species, and 2) the seesaw structure then enables a pronounced excited state structural deformation as confirmed by density functional theory (DFT) calculations.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
DOE Contract Number:
AC05-00OR22725; DMR-1709116; CHE-1664661; CHE-1464955
OSTI ID:
1414690
Journal Information:
Angewandte Chemie (International Edition), Vol. 56; ISSN 1433-7851
Publisher:
Wiley
Country of Publication:
United States
Language:
English

References (26)

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
deep-red emission
large Stokes shift
organic-inorganic hybrids
seesaw structure
zero-dimensional materials