Synthesis of Cadmium Selenide Quantum Dots, Using 2,2-Bipyridine as a Capping and Phase Transfer Agent

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Cadmium selenide quantum dots (CdSe QDs), were synthesized by one-pot or water-to-organic phase transfer and capped with molten 2,2′-bipyridine (bipy). The obtained CdSe QDs by the two-step procedure, reveal average sizes of 2 nm while the one-pot are mixed with secondary salt products and bipy and are undetectable by TEM. However the absorption peak of both CdSe QDs was at 425 nm and the emission band is centered at 535 nm, with a band width at half height of 77 nm, when excited with 425 nm light. The two-step CdSe QDs synthesis has the great advantage of capping the CdSe QDs with bipy, forming a solid phase, which is easily stored and dispersed in most of the organic solvents. On the other hand, the one-pot procedure requires an extra step to remove the secondary products.

Original languageEnglish
Pages (from-to)1271-1274
Number of pages4
JournalChemistrySelect
Volume2
Issue number3
DOIs
Publication statusPublished - 2017

Fingerprint

Semiconductor quantum dots
Organic solvents
Molten materials
Salts
cadmium selenide
Transmission electron microscopy
Bandwidth
Water

Keywords

  • 2,2-bipyridine
  • cadmium selenide
  • one-pot synthesis

Cite this

@article{fad6f487fc124258bfe22c885419d5f6,
title = "Synthesis of Cadmium Selenide Quantum Dots, Using 2,2-Bipyridine as a Capping and Phase Transfer Agent",
abstract = "Cadmium selenide quantum dots (CdSe QDs), were synthesized by one-pot or water-to-organic phase transfer and capped with molten 2,2′-bipyridine (bipy). The obtained CdSe QDs by the two-step procedure, reveal average sizes of 2 nm while the one-pot are mixed with secondary salt products and bipy and are undetectable by TEM. However the absorption peak of both CdSe QDs was at 425 nm and the emission band is centered at 535 nm, with a band width at half height of 77 nm, when excited with 425 nm light. The two-step CdSe QDs synthesis has the great advantage of capping the CdSe QDs with bipy, forming a solid phase, which is easily stored and dispersed in most of the organic solvents. On the other hand, the one-pot procedure requires an extra step to remove the secondary products.",
keywords = "2,2-bipyridine, cadmium selenide, one-pot synthesis",
author = "Sousa, {David M.} and Lima, {Jo{\~a}o Carlos} and Isabel Ferreira",
note = "This work was mainly funded by ERC-CoG-2014, ChapTherPV, 647596, and partially by H2020-ICT-2014-1, RIA, TransFlexTeg, 645241 and FEDER funds through the COMPETE 2020 Program and National Funds through FCT - Portuguese Foundation for Science and Technology under the project UID/CTM/50025/2013.",
year = "2017",
doi = "10.1002/slct.201601804",
language = "English",
volume = "2",
pages = "1271--1274",
journal = "ChemistrySelect",
issn = "2365-6549",
publisher = "Wiley",
number = "3",

}

Synthesis of Cadmium Selenide Quantum Dots, Using 2,2-Bipyridine as a Capping and Phase Transfer Agent. / Sousa, David M.; Lima, João Carlos; Ferreira, Isabel.

In: ChemistrySelect, Vol. 2, No. 3, 2017, p. 1271-1274.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Synthesis of Cadmium Selenide Quantum Dots, Using 2,2-Bipyridine as a Capping and Phase Transfer Agent

AU - Sousa, David M.

AU - Lima, João Carlos

AU - Ferreira, Isabel

N1 - This work was mainly funded by ERC-CoG-2014, ChapTherPV, 647596, and partially by H2020-ICT-2014-1, RIA, TransFlexTeg, 645241 and FEDER funds through the COMPETE 2020 Program and National Funds through FCT - Portuguese Foundation for Science and Technology under the project UID/CTM/50025/2013.

PY - 2017

Y1 - 2017

N2 - Cadmium selenide quantum dots (CdSe QDs), were synthesized by one-pot or water-to-organic phase transfer and capped with molten 2,2′-bipyridine (bipy). The obtained CdSe QDs by the two-step procedure, reveal average sizes of 2 nm while the one-pot are mixed with secondary salt products and bipy and are undetectable by TEM. However the absorption peak of both CdSe QDs was at 425 nm and the emission band is centered at 535 nm, with a band width at half height of 77 nm, when excited with 425 nm light. The two-step CdSe QDs synthesis has the great advantage of capping the CdSe QDs with bipy, forming a solid phase, which is easily stored and dispersed in most of the organic solvents. On the other hand, the one-pot procedure requires an extra step to remove the secondary products.

AB - Cadmium selenide quantum dots (CdSe QDs), were synthesized by one-pot or water-to-organic phase transfer and capped with molten 2,2′-bipyridine (bipy). The obtained CdSe QDs by the two-step procedure, reveal average sizes of 2 nm while the one-pot are mixed with secondary salt products and bipy and are undetectable by TEM. However the absorption peak of both CdSe QDs was at 425 nm and the emission band is centered at 535 nm, with a band width at half height of 77 nm, when excited with 425 nm light. The two-step CdSe QDs synthesis has the great advantage of capping the CdSe QDs with bipy, forming a solid phase, which is easily stored and dispersed in most of the organic solvents. On the other hand, the one-pot procedure requires an extra step to remove the secondary products.

KW - 2,2-bipyridine

KW - cadmium selenide

KW - one-pot synthesis

UR - http://www.scopus.com/inward/record.url?scp=85041806486&partnerID=8YFLogxK

U2 - 10.1002/slct.201601804

DO - 10.1002/slct.201601804

M3 - Article

VL - 2

SP - 1271

EP - 1274

JO - ChemistrySelect

JF - ChemistrySelect

SN - 2365-6549

IS - 3

ER -