The principal metric for positioning each institution in the ranking is the sum of the D-indexes (Discipline H-index) of all qualifying scientists whose primary field of publication is Chemistry and who are affiliated with each institution. The D-index is carefully calculated to exclusively consider publications and citation data directly relevant to Chemistry, ensuring the ranking reflects true performance in the discipline.
Scope of Research and Evaluation Criteria
To ensure both depth and breadth of coverage, the current edition examined 279,971 scientist profiles identified from a variety of bibliometric databases. Out of these, 279,971 scientists specifically working in the field of Chemistry were closely analyzed.
To maintain rigor, only scientists with a D-index of at least 40 were considered; moreover, a majority of each candidate’s most prominent publications had to be in Chemistry. The evaluation not only considered citation-based metrics but also accounted for scientists’ awards and achievements in their field.
The D-index threshold for recognizing top researchers is dynamically set in increments of 10, calibrated according to the volume of scholars in each discipline, to ensure inclusion of the top 1% of leading scholars. Furthermore, a proximity constraint of 30% or less was imposed between a scientist’s general H-index and their D-index, confirming substantive engagement within the field of Chemistry. The assessment also considered notable recognitions and contributions in Chemistry, ensuring a comprehensive evaluation of each scholar’s influence and impact.
Verification and Quality Assurance
Recognizing that raw data alone cannot encompass the full breadth of scholarly achievement, the ranking developers took extra steps to guarantee integrity and accuracy. Every scientist profile considered was manually verified and cross-referenced against a wide variety of trusted sources and scientific publications.
Although the quantity of publications in top journals and conference proceedings is not a direct factor in determining position in the Research.com ranking, it serves as a valuable secondary signal of a researcher’s contribution within the field of Chemistry.
The ranking positions are determined by each scientist’s H-index for Chemistry, based on the best available data from OpenAlex and CrossRef—the most established bibliometric databases in the research community. For a comprehensive explanation of our ranking methodology, please consult our methodology page.
Research.com’s Mission and Agenda
Our core mission is to inspire scientists, business leaders, and policymakers worldwide to explore the evolving landscape of top experts. By providing transparent and rigorous rankings, Research.com equips the wider academic and scientific community with a dependable means of identifying who the leading authorities are in specific disciplines, across countries, and within research institutions. This initiative aims to foster collaboration, drive informed decision-making, and support scientific advancement.
Key Results of the 4th Edition Ranking
Below are the principal findings from the 4th edition of the Research.com Best Chemistry Universities in Spain Ranking:
- Top 3 Spanish institutions by number of leading Chemistry scientists:
- University of Barcelona – 52 scientists
- University of Valencia – 33 scientists
- University of Zaragoza – 31 scientists
- The world’s most prominent Chemistry scholars are affiliated with:
École Polytechnique Fédérale de Lausanne, Harvard University, Technical University of Denmark, Tsinghua University, Carnegie Mellon University, MIT, Chinese University of Hong Kong (Shenzhen), University of Minnesota, University of California (Santa Barbara), and Northwestern University.
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Leading Chemistry Scientists Worldwide:
- Professor Michael Grätzel (École Polytechnique Fédérale de Lausanne) – D-index: 289 (Rank 1)
- George M. Whitesides (Harvard University) – D-index: 266 (Rank 2)
- Jens K. Nørskov (Technical University of Denmark) – D-index: 228 (Rank 3)
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Average total D-index:
- Top 5% universities: 3781
- All 1,526 universities in ranking: 601
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Average number of published Chemistry articles:
- Top 5% universities: 17,397
- All 1,526 universities: 2,823
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Average number of citations for researchers:
- Top 1% universities: 1,279,971
- All 1,526 universities: 279,971
This ranking is the result of exhaustive data analysis, cross-verification, and strict adherence to established bibliometric standards, providing the Spanish—and international—academic community with a transparent view of leadership in Chemistry research.
