New Forms of CdSe: Molecular Wires, Gels, and Ordered Mesoporous Assemblies.
This work investigates the structure and properties of soluble chalcogenidocadmates, a molecular form of cadmium chalcogenides with unprecedented one-dimensional bonding motifs. The single crystal X-ray structure reveals that sodium selenocadmate consists of infinite one-dimensional wires of (Cd2Se3)n2n-charge balanced by Na+and stabilized by coordinating solvent molecules. Exchanging the sodium cation with tetraethylammonium or didodecyldimethylammonium expands the versatility of selenocadmate by improving its solubility in a variety of polar and nonpolar solvents without changing the anion structure and properties. The introduction of a micelle-forming cationic surfactant allows for the templating of selenocadmate, or the analogous telluride species, to create ordered organic-inorganic hybrid CdSe or CdTe mesostructures. Finally, the interaction of selenocadmate "wires" with Cd2+ions creates an unprecedented gel-like form of stoichiometric CdSe. We also demonstrate that these low-dimensional CdSe species show characteristic semiconductor behavior, and can be used in photodetectors and field-effect transistors.
Department of Chemistry and James Franck Institute, The University of Chicago , Chicago, Illinois 60637, United States.
Margaret H
0000-0002-8977-8139
MH
Hudson
Department of Chemistry and James Franck Institute, The University of Chicago , Chicago, Illinois 60637, United States.
Dmitriy S
DS
Dolzhnikov
Department of Chemistry and James Franck Institute, The University of Chicago , Chicago, Illinois 60637, United States.
Alexander S
AS
Filatov
Department of Chemistry and James Franck Institute, The University of Chicago , Chicago, Illinois 60637, United States.
Eric M
EM
Janke
Department of Chemistry and James Franck Institute, The University of Chicago , Chicago, Illinois 60637, United States.
Jaeyoung
J
Jang
Advanced Photon Source, Argonne National Laboratory , Argonne, Illinois 60439, United States.
Byeongdu
0000-0003-2514-8805
B
Lee
Advanced Photon Source, Argonne National Laboratory , Argonne, Illinois 60439, United States.
Chengjun
C
Sun
Department of Chemistry and James Franck Institute, The University of Chicago , Chicago, Illinois 60637, United States.|Center for Nanoscale Materials, Argonne National Laboratory , Argonne, Illinois 60439, United States.
Dmitri V
0000-0002-6414-8587
DV
Talapin