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Title: Composition and Structure of Fluorescent Graphene Quantum Dots Generated by Enzymatic Degradation of Graphene Oxide

Journal Article · · Journal of Physical Chemistry. C
 [1];  [2]; ORCiD logo [1]
  1. Univ. of Pittsburgh, PA (United States)
  2. National Energy Technology Lab. (NETL), Pittsburgh, PA (United States); Univ. of Pittsburgh, PA (United States)

The broad applications of carbon nanomaterials (CNMs) in both materials and life sciences necessitate investigation of their metabolites due to the inevitable contact of CNMs and biological systems. Graphene oxide (GO), along with other types of CNMs, can be enzymatically degraded by myeloperoxidase (MPO), an enzyme released during the innate immune response. However, the enzymatic degradation products are neither well-defined nor well-understood. Some products generated during MPO-catalyzed degradation of GO could emit blue photoluminescence (PL) and were simply dubbed graphene quantum dots (GQDs) without further elucidating their structures. In this work, we use liquid chromatography-mass spectrometry (LC-MS) to isolate and elucidate chemical structures of the MPO-catalyzed degradation products. A general chemical formula screening workflow was developed for the GQDs, which are in the form of polyaromatic hydrocarbons (PAHs), obtained in the degradation products. Structures of the PAHs responsible for the blue PL were further proposed using density functional theory (DFT) calculations. Our results indicated that structures with several conjugated benzene rings are likely to generate the observed PL. This work provides insights into the mechanism of enzymatic degradation and open opportunities for fluorescence imaging of GO in biological systems.

Research Organization:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
2003302
OSTI ID:
1836782
Journal Information:
Journal of Physical Chemistry. C, Vol. 125, Issue 24; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (61)

Water-Soluble Fluorescent Carbon Quantum Dots and Photocatalyst Design journal June 2010
Sodium adduct formation efficiency in ESI source: Sodium adduct formation efficiency in ESI source journal May 2013
Enzymatic oxidative biodegradation of nanoparticles: Mechanisms, significance and applications journal May 2016
Applications of mass spectrometry for cellular lipid analysis journal January 2015
Blue Photoluminescence from Chemically Derived Graphene Oxide journal January 2010
HOMO−LUMO Gap as an Index of Molecular Size and Structure for Polycyclic Aromatic Hydrocarbons (PAHs) and Asphaltenes:  A Theoretical Study. I journal November 2002
A Natural Vanishing Act: The Enzyme-Catalyzed Degradation of Carbon Nanomaterials journal July 2012
Comparative developmental toxicity of a comprehensive suite of polycyclic aromatic hydrocarbons journal November 2017
Carbon-based electrocatalysts for advanced energy conversion and storage journal August 2015
Carbon nanotubes degraded by neutrophil myeloperoxidase induce less pulmonary inflammation journal April 2010
Development of a Mass Spectrometry Imaging Method for Detecting and Mapping Graphene Oxide Nanoparticles in Rodent Tissues journal March 2020
Inactivation of myeloperoxidase by benzoic acid hydrazide journal March 2015
Adiabatic time-dependent density functional methods for excited state properties journal October 2002
Environmentally prevalent polycyclic aromatic hydrocarbons can elicit co-carcinogenic properties in an in vitro murine lung epithelial cell model journal November 2017
Clinical Applications of Carbon Nanomaterials in Diagnostics and Therapy journal August 2018
Thermochemical Studies of Epoxides and Related Compounds journal April 2013
Blue and green luminescent carbon nanodots from controllable fuel-rich flame reactors journal October 2019
Hydrazine and Thermal Reduction of Graphene Oxide: Reaction Mechanisms, Product Structures, and Reaction Design journal December 2009
Simple Semiempirical Method for the Location Determination of HOMO and LUMO of Carbon Dots journal March 2021
Graphene Oxide Nanoribbons: Improved Synthesis and Application in MALDI Mass Spectrometry journal February 2015
Loss of H 2 and CO from protonated aldehydes in electrospray ionization mass spectrometry: Loss of H 2 and CO from protonated aldehydes journal July 2014
Review of toxicity studies of carbon nanotubes journal September 2017
A new integral equation formalism for the polarizable continuum model: Theoretical background and applications to isotropic and anisotropic dielectrics journal August 1997
Metabolic activation of polycyclic and heterocyclic aromatic hydrocarbons and DNA damage: A review journal August 2005
Safety Assessment of Graphene-Based Materials: Focus on Human Health and the Environment journal November 2018
Graphene oxide is degraded by neutrophils and the degradation products are non-genotoxic journal January 2018
A new hybrid exchange–correlation functional using the Coulomb-attenuating method (CAM-B3LYP) journal July 2004
Quantum Mechanical Continuum Solvation Models journal August 2005
Amino Acids Analysis by MALDI Mass Spectrometry Using Carbon Nanotube as Matrix journal February 2005
Toxification of polycyclic aromatic hydrocarbons by commensal bacteria from human skin journal April 2017
Elucidating the structure of carbon nanoparticles by ultra-performance liquid chromatography coupled with electrospray ionisation quadrupole time-of-flight tandem mass spectrometry journal March 2016
Mechanistic Investigations of Horseradish Peroxidase-Catalyzed Degradation of Single-Walled Carbon Nanotubes journal December 2009
Electronic Transport Properties of Individual Chemically Reduced Graphene Oxide Sheets journal November 2007
Photo-Fenton Reaction of Graphene Oxide: A New Strategy to Prepare Graphene Quantum Dots for DNA Cleavage journal July 2012
Toxicity of carbon-based nanomaterials: Reviewing recent reports in medical and biological systems journal July 2019
Time-dependent density-functional theory for molecules and molecular solids journal November 2009
Electrochemically Exfoliated Graphene and Graphene Oxide for Energy Storage and Electrochemistry Applications journal October 2015
Insight into the Mechanism of Graphene Oxide Degradation via the Photo-Fenton Reaction journal May 2014
Studies of the equilibrium and thermodynamics of the adsorption of Cu2+ onto as-produced and modified carbon nanotubes journal July 2007
Geometries and properties of excited states in the gas phase and in solution: Theory and application of a time-dependent density functional theory polarizable continuum model journal March 2006
Mass spectrometry imaging reveals the sub-organ distribution of carbon nanomaterials journal February 2015
Efficient Reduction of Graphite Oxide by Sodium Borohydride and Its Effect on Electrical Conductance journal June 2009
Hypochlorite degrades 2D graphene oxide sheets faster than 1D oxidised carbon nanotubes and nanohorns journal November 2017
Catalytic epoxidation of aliphatic terminal olefins with sodium hypochlorite journal January 1984
Electrochemical Resolution of Multiple Redox Events for Graphene Quantum Dots journal January 2013
New insights into the structure and reduction of graphite oxide journal July 2009
Photoluminescence Response in Carbon Nanomaterials to Enzymatic Degradation journal August 2020
Biodegradation aspects of Polycyclic Aromatic Hydrocarbons (PAHs): A review journal September 2009
Assessing DNA damage from enzyme-oxidized single-walled carbon nanotubes journal August 2013
Practical implications of some recent studies in electrospray ionization fundamentals journal January 2001
Fragmentation reactions using electrospray ionization mass spectrometry: an important tool for the structural elucidation and characterization of synthetic and natural products journal January 2016
Reduced graphene oxide by chemical graphitization journal September 2010
Carbon Nanomaterials for Advanced Energy Conversion and Storage journal March 2012
Adduct Formation in ESI/MS by Mobile Phase Additives journal March 2017
A low-temperature method to produce highly reduced graphene oxide journal February 2013
Dityrosine, a specific marker of oxidation, is synthesized by the myeloperoxidase-hydrogen peroxide system of human neutrophils and macrophages. journal February 1993
Selective Oxidation on Metallic Carbon Nanotubes by Halogen Oxoanions journal February 2008
Developmental toxicity of 4-ring polycyclic aromatic hydrocarbons in zebrafish is differentially dependent on AH receptor isoforms and hepatic cytochrome P4501A metabolism journal December 2006
Dispersibility-Dependent Biodegradation of Graphene Oxide by Myeloperoxidase journal May 2015
Towards a taxonomy of topology for polynuclear aromatic hydrocarbons: linking electronic and molecular structure journal January 2017
Structural evolution during the reduction of chemically derived graphene oxide journal June 2010