In-situ Spectroscopic Characterization of a Solution-Phase X-Type Ligand Exchange at Colloidal Lead Sulphide Quantum Dot Surfaces

Matthew Beard; Arthur Nozik; Daniel Kroupa; Nicholas Anderson; Chloe Castaneda

doi:10.1039/C6CC08114B

In-situ Spectroscopic Characterization of a Solution-Phase X-Type Ligand Exchange at Colloidal Lead Sulphide Quantum Dot Surfaces

Matthew Beard
, Arthur Nozik
, Daniel Kroupa
, Nicholas Anderson
, Chloe Castaneda

Chemistry and Nanoscience

Research output: Contribution to journal › Article › peer-review

36 Scopus Citations

Abstract

We employed quantitative NMR spectroscopy and spectrophotometric absorbance titration to study a quantum dot X-type ligand exchange reaction. We find that the exchange is highly cooperative, where at low extents of exchange the change in free energy of the reaction, ΔG_XC, is ∼11 kJ mol^-1 while at higher extents of exchange ΔG_XC saturates to ∼-4 kJ mol^-1. A modified Fowler binding isotherm is developed to describe the reaction.

Original language	American English
Pages (from-to)	13893-13896
Number of pages	4
Journal	Chemical Communications
Volume	52
Issue number	96
DOIs	https://doi.org/10.1039/C6CC08114B https://doi.org/10.1039/C6CC08114B
State	Published - 2016

Bibliographical note

Publisher Copyright:
© The Royal Society of Chemistry.

NLR Publication Number

NREL/JA-5900-67253

Keywords

ligand exchange
PbS QDs
QD surface chemistry
solar-photochemistry

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title = "In-situ Spectroscopic Characterization of a Solution-Phase X-Type Ligand Exchange at Colloidal Lead Sulphide Quantum Dot Surfaces",

abstract = "We employed quantitative NMR spectroscopy and spectrophotometric absorbance titration to study a quantum dot X-type ligand exchange reaction. We find that the exchange is highly cooperative, where at low extents of exchange the change in free energy of the reaction, ΔGXC, is ∼11 kJ mol-1 while at higher extents of exchange ΔGXC saturates to ∼-4 kJ mol-1. A modified Fowler binding isotherm is developed to describe the reaction.",

keywords = "ligand exchange, PbS QDs, QD surface chemistry, solar-photochemistry",

author = "Matthew Beard and Arthur Nozik and Daniel Kroupa and Nicholas Anderson and Chloe Castaneda",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry.",

year = "2016",

doi = "10.1039/C6CC08114B",

language = "American English",

volume = "52",

pages = "13893--13896",

journal = "Chemical Communications",

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publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - In-situ Spectroscopic Characterization of a Solution-Phase X-Type Ligand Exchange at Colloidal Lead Sulphide Quantum Dot Surfaces

AU - Beard, Matthew

AU - Nozik, Arthur

AU - Kroupa, Daniel

AU - Anderson, Nicholas

AU - Castaneda, Chloe

N1 - Publisher Copyright: © The Royal Society of Chemistry.

PY - 2016

Y1 - 2016

N2 - We employed quantitative NMR spectroscopy and spectrophotometric absorbance titration to study a quantum dot X-type ligand exchange reaction. We find that the exchange is highly cooperative, where at low extents of exchange the change in free energy of the reaction, ΔGXC, is ∼11 kJ mol-1 while at higher extents of exchange ΔGXC saturates to ∼-4 kJ mol-1. A modified Fowler binding isotherm is developed to describe the reaction.

AB - We employed quantitative NMR spectroscopy and spectrophotometric absorbance titration to study a quantum dot X-type ligand exchange reaction. We find that the exchange is highly cooperative, where at low extents of exchange the change in free energy of the reaction, ΔGXC, is ∼11 kJ mol-1 while at higher extents of exchange ΔGXC saturates to ∼-4 kJ mol-1. A modified Fowler binding isotherm is developed to describe the reaction.

KW - ligand exchange

KW - PbS QDs

KW - QD surface chemistry

KW - solar-photochemistry

UR - https://www.scopus.com/pages/publications/84998694423

U2 - 10.1039/C6CC08114B

DO - 10.1039/C6CC08114B

M3 - Article

AN - SCOPUS:84998694423

SN - 1359-7345

VL - 52

SP - 13893

EP - 13896

JO - Chemical Communications

JF - Chemical Communications

IS - 96

ER -

In-situ Spectroscopic Characterization of a Solution-Phase X-Type Ligand Exchange at Colloidal Lead Sulphide Quantum Dot Surfaces

Abstract

Bibliographical note

NLR Publication Number

Keywords

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