Chemistry and Chemical Biology ETDs

Publication Date

Summer 7-15-2022

Abstract

Fundamental advances in our ability to design and construct electronic components at the nanoscale will require new design paradigms. One proposed nanoscale electronic component is the molecular rectifier. Molecular and molecule-based electronic components are advantageous due to their ease of synthetic manipulation, and the fact that the size dimensions of molecules are inherently at the nanoscale (0.5 - 3nm). Our group has shown how the Donor-Bridge-Acceptor biradical approach can be used to derive key structure-property relationships that allow insight into the choice of bridge fragments for molecular rectification by using constitutional isomers of the donor-bridge-acceptor biradical (NN-Th-Py-SQ) (S=1/2 ortho-semiquinonate, SQ; S=1/2 nitronlynitroxide, NN; Th = thiophene; Py = pyridine). These NN-bridge-SQ complexes serve as constant bias analogs for molecular current rectifying devices. The efficiency of rectification is given by the rectification ratio (RR = gforward/greverse; where g = conductance). The experimental and calculated RRs for (NN-Th-Py-SQ) isomers is 1.58 and 1.24

Project Sponsors

NSF DOE EPSCOR

Language

English

Keywords

Biradical Donor acceptor rectifier conductance spin

Document Type

Dissertation

Degree Name

Chemistry and Chemical Biology

Level of Degree

Doctoral

Department Name

Department of Chemistry and Chemical Biology

First Committee Member (Chair)

Martin L. Kirk

Second Committee Member

Brian Gold

Third Committee Member

Changjian Feng

Fourth Committee Member

Dongchang Chen

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