Nelson Vinueza Benitez

Assoc Professor

Textiles Complex 3120

Bio

Dr. Vinueza was born and raised in Quito-Ecuador; his formal education began at Colegio Americano de Quito (School). Later Dr. Vinueza obtained his B.S. in Industrial Chemistry and B.S. in Chemical Engineering at Universidad San Francisco de Quito. He then earned his Ph.D. in Physical Organic Chemistry from Purdue University, under the mentorship of Professor Hilkka Kenttämaa, where he studied the chemical reactivity of carbon-center tri- and tetraradicals as a way to design better cancer drugs, Also, during this time he complete all the requirements of Purdue’s Forensic Minor program.In 2010, Dr. Vinueza was a Post-doctoral fellow of the Department of Energy (DOE) in the Center of Direct Catalytic Conversion of Biomass to Biofuels (C3BIO) an Energy Frontiers Research Center, at Purdue University. During this time Vinueza’s research focus was the development of new mass spectrometry methods for the analysis of lignin and cellulose degradation products as well as bio-oil.Prior to joining NC State as an Assistant Professor, Dr. Vinueza was part of the Proyecto Prometeo of Ecuador, which is an initiative of the Ecuadorian government to enhance the productivity and research of national institutions and to attract top scientists. As part of Prometeo, Dr. Vinueza joined the Ecuadorian Prosecutor’s Office (Fiscalia General del Estado del Ecuador) to advance the area of Forensic Sciences. During this time, he managed the process of opening three new forensic national laboratories and demonstrating their capabilities to the national authorities and to the national press. Dr. Vinueza was in charge of setting up the laboratories of chemistry, biology and histopathology, as well as training in the area of criminalistics, forensic and analytical chemistry for the 45 new scientists of the three new forensic centers.Also, as part of the Prometeo project he was involved in the development of the chemistry program of the new research university Yachay, one of biggest investment of the actual government.

Research

Research in the Vinueza group centers around three aspects of mass spectrometry (MS): fundamentals, instrumentation and applications. Fundamental studies aimed to enhance the analytical capabilities of mass spectrometry focus on the characterization of dyes from the recent donated Max Weaver dye library, with around 100,000 dyes.

Instrumentation development includes a wide range of projects in tandem mass spectrometry (MS/MS), chromatography and microfluidics. We are currently utilizing microfluidics to extract dyes from fibers in combination with a quadrupole-time-of-flight for a faster characterization.

Applications of MS techniques developed in our group include studies in biofuels and forensic analysis. Current projects include characterization of bio-oil from lignocellulose biomass, sequencing of oligosaccharides and fast analysis of chemicals of forensic interest, such as dyes, inks, fibers, polymers and drugs. These applications involve direct collaboration with colleagues in other departments on campus and around the world.

Mass spectrometry, chromatography, FT-Raman, FT-IR, organic synthesis and gas-phase ion chemistry are central tools for the lab.

Teaching

PCC 104 – Introduction to Polymer and Color Chemistry Laboratory ,
PCC 474 – Forensic Analytical Chemistry Laboratory ,
PCC 412 – Textile Chemical Analysis ,
PCC 414 – Textile Chemical Analysis Laboratory ,
T 491 – Honors Seminar in Textiles ,
TC 589 – Criminalsitics and Forensic Chemical Analysis ,

Education

Post-doctoral fellow C3Bio, DOE EFRC (Energy Frontiers Research Center) Research Focus: Develop mass spectrometry methods for the analysis of lignin and cellulose degradation products as well as bio-oil Purdue University 2012

Ph.D. Physical Organic Chemistry Purdue University 2010

Dissertation Reactivity Studies of Charged σ,σ,σ-Triradicals Using the Distonic Ion Approach and Fourier Transform Ion Cyclotron Resonance Mass Spectrometry

B.S. Chemical Engineering Universidad San Francisco de Quito, Quito-Ecuado 2003

B.S. Industrial Chemistry Universidad San Francisco de Quito, Quito-Ecuado 2001

Area(s) of Expertise

Analytical Chemistry
Color Science
Dyeing and Finishing
Forensics
Sustainability
Textile Chemistry

Publications

Quantification of docusate antimicrobial finishing after simulated landfill degradation via tandem mass spectrometry and QuEChERS extraction , ANALYTICAL METHODS (2022)
Synthetic dyes: A mass spectrometry approach and applications , MASS SPECTROMETRY REVIEWS (2022)
The characterization of disperse dyes in polyester fibers using DART mass spectrometry , JOURNAL OF FORENSIC SCIENCES (2022)
A promising Ames battery for mutagenicity characterization of new dyes , ENVIRONMENTAL AND MOLECULAR MUTAGENESIS (2021)
Are all charge-transfer parameters created equally? A study of functional dependence and excited-state charge-transfer quantification across two dye families , PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2021)
Identification and quantification of CI Reactive Blue 19 dye degradation product in soil , COLORATION TECHNOLOGY (2021)
Molecular characterization and ecotoxicological evaluation of the natural dye madder and its chlorinated products , ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2021)
Separation and identification of commercial reactive dyes with hydrophilic interaction liquid chromatography and quadrupole time‐of‐flight mass spectrometry , Coloration Technology (2021)
Characterization of synthetic dyes for environmental and forensic assessments: A chromatography and mass spectrometry approach , Journal of Separation Science (2020)
Degradation studies of CI Reactive Blue 19 on biodegraded cellulosic fabrics via liquid chromatography-photodiode array detection coupled to high resolution mass spectrometry , COLORATION TECHNOLOGY (2019)

View all publications