Citation Rankings
Highly Cited Researchers
Natural Sciences / Chemical Sciences Highly Cited Researchers Citation Rankings (Sort by last 6 years Citation Index) 2025
The Citation Rankings (Highly Cited Researchers) highlight the most cited and influential researchers across a vast range of scientific fields, covering 197 main and sub-disciplines, including the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings. This service, offered exclusively by AD Scientific Index, aims to provide a balanced perspective by excluding data from CERN and other statistical sources that disproportionately favor certain researchers, particularly in the social sciences and humanities. This unique approach addresses the advantages researchers with multi-author publications and CERN involvement hold over others. Furthermore, citation rankings help uncover rule violations and unethical practices within the research community. For more detailed citation analyses, explore the Scientists Last 6 Years Citation Index, Universities Total Citations Rankings 2025, and Universities Last 6 Years Citations Rankings 2025.
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 1
Photophysics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,581
13,636
0.383
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 2
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,373
5,017
0.484
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 3
Bioinformatics
Biophysics
Structural Biology
Computational Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,932
2,440
0.832
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 4
Diagnostics
Electrochemistry
Biosensors
Nanotechnology
Phthalocyanines
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,597
1,050
0.657
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 5
Reaction Mechanism
Carbocations and Carbocation Rearrangements
Drug Discovery
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,376
1,035
0.752
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 6
Supramolecular Chemistry
Solid-state chemistry
Crystal engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,377
946
0.687
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 7
Nanochemistry
Nanoscience & Nanotechnology
Nanobiosensors Design
Optical Spectroscopy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,112
924
0.831
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 8
Photochemistry
Nanotechnolgy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,057
686
0.649
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 9
Medicinal and Bioorganometallic Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
856
570
0.666
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 10
Phthalocyanine Chemistry
Spectroscopy and Electrochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,203
568
0.472
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 11
inorganic chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,405
560
0.399
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 12
Heterocyclic Chemistry
Nanomedicine
Computational Chemistry
Optoelectronics
Sensors
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
312
301
0.965
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 13
Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
257
250
0.973
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 14
User Experience
Health Information Technologies
Consumer Health Informatics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
493
138
0.280
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 15
Medicinal Chemistry
Drug Delivery
Pharmaceutics
Nanotechnology
Biocatalysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
54
54
1.000
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 16
Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
48
48
1.000
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 17
Chemistry
solar energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
129
40
0.310
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 18
Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39
39
1.000
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 19
Analytical chemistry
inorganic chemistry
chemical kinetics
computational chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
82
32
0.390
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection: 20
Organometallic synthesis
homogeneous catalysis
NMR spectroscopy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38
30
0.789
* Last 6 Years Citation Counts Rankings
Rankings
22,914
86
2
Ranking Based On Selection: 1
Tebello Nyokong
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
35,581
13,636
0.383
* Last 6 Years Citation Counts Rankings
Rankings
93,743
382
6
Ranking Based On Selection: 2
John Mack
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,373
5,017
0.484
* Last 6 Years Citation Counts Rankings
Rankings
215,596
959
19
Ranking Based On Selection: 3
Faez Iqbal Khan
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,932
2,440
0.832
Bioinformatics
Biophysics
Structural Biology
Computational Chemistry
* Last 6 Years Citation Counts Rankings
Rankings
460,837
2,211
61
Ranking Based On Selection: 4
Philani Mashazi
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,597
1,050
0.657
Diagnostics
Electrochemistry
Biosensors
Nanotechnology
Phthalocyanines
* Last 6 Years Citation Counts Rankings
Rankings
465,939
2,238
62
Ranking Based On Selection: 5
Kevin Lobb
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,376
1,035
0.752
Reaction Mechanism
Carbocations and Carbocation Rearrangements
Drug Discovery
* Last 6 Years Citation Counts Rankings
Rankings
497,158
2,437
65
Ranking Based On Selection: 6
Vincent J Smith
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,377
946
0.687
Supramolecular Chemistry
Solid-state chemistry
Crystal engineering
* Last 6 Years Citation Counts Rankings
Rankings
505,549
2,490
68
Ranking Based On Selection: 7
Ojodomo Achadu
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,112
924
0.831
Nanochemistry
Nanoscience & Nanotechnology
Nanobiosensors Design
Optical Spectroscopy
* Last 6 Years Citation Counts Rankings
Rankings
613,247
3,119
76
Ranking Based On Selection: 8
Jonathan Britton
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,057
686
0.649
* Last 6 Years Citation Counts Rankings
Rankings
681,126
3,561
91
Ranking Based On Selection: 9
Setshaba D. Khanye
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
856
570
0.666
Medicinal and Bioorganometallic Chemistry
* Last 6 Years Citation Counts Rankings
Rankings
682,277
3,571
92
Ranking Based On Selection: 10
Samson Khene
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,203
568
0.472
Phthalocyanine Chemistry
Spectroscopy and Electrochemistry
* Last 6 Years Citation Counts Rankings
Rankings
687,385
3,606
93
Ranking Based On Selection: 11
Gareth Mostyn Watkins
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,405
560
0.399
* Last 6 Years Citation Counts Rankings
Rankings
946,525
5,393
121
Ranking Based On Selection: 12
Nnamdi Nwahara
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
312
301
0.965
Heterocyclic Chemistry
Nanomedicine
Computational Chemistry
Optoelectronics
Sensors
* Last 6 Years Citation Counts Rankings
Rankings
1,031,133
6,088
138
Ranking Based On Selection: 13
Karunganathan Sakthikumar
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
257
250
0.973
* Last 6 Years Citation Counts Rankings
Rankings
1,306,723
8,358
182
Ranking Based On Selection: 14
Greg Foster
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
493
138
0.280
User Experience
Health Information Technologies
Consumer Health Informatics
* Last 6 Years Citation Counts Rankings
Rankings
1,709,712
12,040
248
Ranking Based On Selection: 15
Justin Bazibuhe Safari
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
54
54
1.000
Medicinal Chemistry
Drug Delivery
Pharmaceutics
Nanotechnology
Biocatalysis
* Last 6 Years Citation Counts Rankings
Rankings
1,752,848
12,444
262
Ranking Based On Selection: 16
Tendamudzimu Tshiwawa
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
48
48
1.000
* Last 6 Years Citation Counts Rankings
Rankings
1,809,189
12,958
275
Ranking Based On Selection: 17
Nomampondomise Flaurette Stuurman|Nomampondomise Molefe, Mpondi Molefe
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
129
40
0.310
* Last 6 Years Citation Counts Rankings
Rankings
1,823,609
13,087
280
Ranking Based On Selection: 18
Ayanda I Zulu
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39
39
1.000
* Last 6 Years Citation Counts Rankings
Rankings
1,880,757
13,648
292
Ranking Based On Selection: 19
Theodor Geswindt
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
82
32
0.390
Analytical chemistry
inorganic chemistry
chemical kinetics
computational chemistry
* Last 6 Years Citation Counts Rankings
Rankings
1,902,478
13,856
295
Ranking Based On Selection: 20
G. Kabelo Ramollo|GK Ramollo
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
38
30
0.789
Organometallic synthesis
homogeneous catalysis
NMR spectroscopy