Carbon nanodots revised: the thermal citric acid/urea reaction.

Chemical Science
Volker StraussPablo Wessig

Abstract

Luminescent compounds obtained from the thermal reaction of citric acid and urea have been studied and utilized in different applications in the past few years. The identified reaction products range from carbon nitrides over graphitic carbon to distinct molecular fluorophores. On the other hand, the solid, non-fluorescent reaction product produced at higher temperatures has been found to be a valuable precursor for the CO2-laser-assisted carbonization reaction in carbon laser-patterning. This work addresses the question of structural identification of both, the fluorescent and non-fluorescent reaction products obtained in the thermal reaction of citric acid and urea. The reaction products produced during autoclave-microwave reactions in the melt were thoroughly investigated as a function of the reaction temperature and the reaction products were subsequently separated by a series of solvent extractions and column chromatography. The evolution of a green molecular fluorophore, namely HPPT, was confirmed and a full characterization study on its structure and photophysical properties was conducted. The additional blue fluorescence is attributed to oligomeric ureas, which was confirmed by complementary optical and structural chara...Continue Reading

References

Aug 12, 2005·Chemical Reviews·Jacopo TomasiRoberto Cammi
Apr 25, 2006·Physical Chemistry Chemical Physics : PCCP·Florian Weigend
Mar 9, 2011·The Journal of Physical Chemistry. a·Manfred E SchusterRobert Schlögl
Jun 12, 2013·Chemical Communications : Chem Comm·Juan ZhouChun-yang Zhang
Oct 11, 2014·Chemical Reviews·Emma L SmithKarl S Ryder
Nov 6, 2014·Journal of the American Chemical Society·Volker StraussDirk M Guldi
Apr 14, 2015·Journal of the American Chemical Society·Benjamin C M MartindaleErwin Reisner
Mar 7, 2017·Chemical Reviews·Hans Blom, Jerker Widengren
Jan 10, 2018·Chemistry, an Asian Journal·Yuri ChoiByeong-Su Kim
Jan 11, 2018·Advanced Materials·Volker StraussRichard B Kaner
Sep 13, 2018·Chemical Reviews·Zheng LiKenneth S Suslick
Apr 17, 2019·Nanoscale·Vanessa HinterbergerWolfgang Peukert
Aug 15, 2019·Nanoscale Research Letters·Donggeon YooMyoung-Hwan Park
May 25, 2016·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·J T MargrafD M Guldi
Nov 21, 2017·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Dominik H HasenöhrlAndreas Hirsch

❮ Previous
Next ❯

Methods Mentioned

BETA
transmission electron microscopy
nuclear magnetic resonance
column chromatography
2D-correlation
transmission
X-ray
differential scanning calorimetry
NMR
multiple-bond correlation spectroscopy
fluorescence imaging

Software Mentioned

Gaussian
MOE

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Bollettino chimico farmaceutico
A DI GIACOMA, G RISPOLDI
Nihon rinsho. Japanese journal of clinical medicine
G Isshiki, I Suyama
© 2021 Meta ULC. All rights reserved