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Dr. Harold
S. Freeman
Associate Dean for Research, Ciba Professor of Dyestuff Chemistry
TECS
Phone:919-515-6552
Email: harold_freeman@ncsu.edu
Address: College of Textiles Box 8301
Room: 3425
Courses
Research Interests
Education
Biography
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Most Recent
Publications:
| 1. |
Freeman, H.S., & Szymczyk, M., & El-Shafei, A..
(2007).
Design, Synthesis, and Characterization of New Iron-Complexed Azo Dyes
Dyes and Pigments
, 72
(1)
(pp. 8-15).
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| 2. |
Freeman, H.S., & Wang, J., & Claxton, L.D..
(2007).
Synthesis and Mutagenic Properties of 4,4'-diamino-p-terphenyl and 4,4'-diamino-p-quaterphenyl
Coloration Technology
, 123
(1)
(pp. 34-38).
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| 3. |
Freeman, H.S., Wang, J., & Claxton, L.D..
(2007).
Synthesis and Mutagenic Properties of Direct Dyes from 4,4'-Diamino-p-terphenyl and 4,4'-Diamino-p-quaterphenyl
Coloration Technology
, 123
(1)
(pp. 39-45).
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| 4. |
Freeman, H.S., & Sun, Y., & Zhao, D..
(2007).
Synthesis and Properties of Disperse Dyes Containing a Built-in Triazine Stabilizer
Coloration Technology
, 74
(3)
(pp. 608-614).
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| 5. |
Freeman, H.S., & Kim, S.D., & Bae, J..
(2006).
Influences of New Azo Dyes to the Aquatic Ecosystem
Fibers and Polymers
, 7
(1)
(pp. 30-35).
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List All Publications
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Courses:
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Prof. Freeman teaches undergraduate courses in dyeing and finishing science and technology, and graduate courses in the chemistry of organic dyes and pigments. Specific courses include PCC 301, PCC 320, TC 720, and TC 721. He normally supervises a group of 8-10 graduate students and research associates each year. He also serves as Associate Dean for Research in the College of Textiles, and maintains a faculty home in the Textile Engineering, Chemistry, and Science department.
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Research Interests:
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Prof. Freeman's research interests cover various aspects of the chemistry and toxicity of organic dyes and pigments. Studies in progress pertain to the following areas.
1. Design and Synthesis of Lightfast Disperse Dyes
The goals include the determination of the mechanism of fading of disperse dyes for automotive applications and the use of the results to design dyes of enhanced photostability. These studies have led to photostable dyes containing a built-in photostabilizer moiety.
2. Environmental Chemistry of Synthetic Dyes
Goals include the design and synthesis of replacements for genotoxic azo dyes and their intermediates. Other studies involve the development of alternatives to metal complexed dyes derived from priority pollutants.
3. Purification Methods for Synthetic Dyes
The development of low cost methods for purifying hydrophilic (sulfonated) dyes is a long-standing objective of our work in this area.
4. Computer-Aided Dyestuff Design
The utility of molecular modeling tools to solve problems in dye chemistry is the goal of studies in this area. Of special interest is the development of reliable methods for predicting absorption maxima, color strength, photostability, and molecular geometry.
5. Synthesis of Organic Pigments
The synthesis of nongenotoxic replacements for benzidine and their use in the development of novel organic pigments for inks and plastics
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Education:
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1981 - Ph.D., Organic Chemistry, North Carolina State University
1978 - M.S., Organic Chemistry, North Carolina State University
1972 - B.S., Chemistry, North Carolina A&T State University
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Biography:
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Prof. Freeman is a native North Carolinian, who completed high school, undergraduate training, and graduate school without leaving his beloved home state. Following the completion of the BS degree in chemistry from N.C. A&T State University, he was employed an organic chemist for 9.5 years at Burroughs-Wellcome Company. It was during this employment that he completed MS and PhD degrees in organic chemistry. He joined N.C. State University as Associate Professor of textile chemistry in 1982 and was promoted to professor in 1989. Two years later he was chosen the first Ciba-Geigy Professor of Dyestuff Chemistry.
Prof. Freeman holds memberships in the American Chemical Society (Organic and Environmental Chemistry Divisions), Sigma Xi, The Genotoxicity and Environmental Mutagen Society, American Association of Textile Chemists and Colorists (AATCC), and American Association for the Advancement of Science. He received the J. William Weaver award and the Olney Medal from AATCC in 1992 and 2004, respectively. Prof. Freeman currently serves as a member of the eitorial boards for Textile Research Journal and Coloration Technology. He is author or co-author of over 120 scientific publications in a variety of journals and books.
Prof. Freeman and his wife, Ruby, share a monthly prison ministry at a local correction center. They also enjoy a home life with their sons, Rodney and Jeramy.
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