Abstract
This paper describes the enhancement of the rate of hole transfer from a photoexcited CdS quantum dot (QD), with radius R = 2.0 nm, to a molecular acceptor, phenothiazine (PTZ), by linking the donor and acceptor through a phenyldithiocarbamate (PTC) linker, which is known to lower the confinement energy of the excitonic hole. Upon adsorption of PTC, the bandgap of the QD decreases due to delocalization of the exciton, primarily the excitonic hole, into interfacial states of mixed QD/PTC character. This delocalization enables hole transfer from the QD to PTZ in 1H NMR. This work provides direct spectroscopic evidence of the enhancement of the rate of hole extraction from a colloidal QD through covalent linkage of a hole acceptor through an exciton-delocalizing ligand.
| Original language | English |
|---|---|
| Pages (from-to) | 6372-6382 |
| Number of pages | 11 |
| Journal | ACS Nano |
| Volume | 10 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 28 2016 |
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Keywords
- CdS quantum dot
- dithiocarbamate
- electronic coupling
- exciton delocalization
- hole transfer
- transient absorption spectroscopy
ASJC Scopus subject areas
- Engineering(all)
- Materials Science(all)
- Physics and Astronomy(all)
Cite this
Subpicosecond Photoinduced Hole Transfer from a CdS Quantum Dot to a Molecular Acceptor Bound Through an Exciton-Delocalizing Ligand. / Lian, Shichen; Weinberg, David J.; Harris, Rachel D.; Kodaimati, Mohamad S.; Weiss, Emily A.
In: ACS Nano, Vol. 10, No. 6, 28.06.2016, p. 6372-6382.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Subpicosecond Photoinduced Hole Transfer from a CdS Quantum Dot to a Molecular Acceptor Bound Through an Exciton-Delocalizing Ligand
AU - Lian, Shichen
AU - Weinberg, David J.
AU - Harris, Rachel D.
AU - Kodaimati, Mohamad S.
AU - Weiss, Emily A
PY - 2016/6/28
Y1 - 2016/6/28
N2 - This paper describes the enhancement of the rate of hole transfer from a photoexcited CdS quantum dot (QD), with radius R = 2.0 nm, to a molecular acceptor, phenothiazine (PTZ), by linking the donor and acceptor through a phenyldithiocarbamate (PTC) linker, which is known to lower the confinement energy of the excitonic hole. Upon adsorption of PTC, the bandgap of the QD decreases due to delocalization of the exciton, primarily the excitonic hole, into interfacial states of mixed QD/PTC character. This delocalization enables hole transfer from the QD to PTZ in 1H NMR. This work provides direct spectroscopic evidence of the enhancement of the rate of hole extraction from a colloidal QD through covalent linkage of a hole acceptor through an exciton-delocalizing ligand.
AB - This paper describes the enhancement of the rate of hole transfer from a photoexcited CdS quantum dot (QD), with radius R = 2.0 nm, to a molecular acceptor, phenothiazine (PTZ), by linking the donor and acceptor through a phenyldithiocarbamate (PTC) linker, which is known to lower the confinement energy of the excitonic hole. Upon adsorption of PTC, the bandgap of the QD decreases due to delocalization of the exciton, primarily the excitonic hole, into interfacial states of mixed QD/PTC character. This delocalization enables hole transfer from the QD to PTZ in 1H NMR. This work provides direct spectroscopic evidence of the enhancement of the rate of hole extraction from a colloidal QD through covalent linkage of a hole acceptor through an exciton-delocalizing ligand.
KW - CdS quantum dot
KW - dithiocarbamate
KW - electronic coupling
KW - exciton delocalization
KW - hole transfer
KW - transient absorption spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=84976590819&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84976590819&partnerID=8YFLogxK
U2 - 10.1021/acsnano.6b02814
DO - 10.1021/acsnano.6b02814
M3 - Article
VL - 10
SP - 6372
EP - 6382
JO - ACS Nano
JF - ACS Nano
SN - 1936-0851
IS - 6
ER -