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Topic · Organic Chemistry

Radical Photochemical Reactions

Radical Photochemical Reactions is a research topic within Organic Chemistry. Science Explorer counts 28k research works in it since 1950. 9.8% of them reached the world's top 10% most cited for their field and year.

This cluster of papers focuses on the applications of photoredox catalysis in organic synthesis, including visible light photoredox catalysis, electrochemical methods, and the use of transition metal complexes. It explores radical reactions, C–H functionalization, photochemical synthesis, and electrocatalysis, with an emphasis on arylation reactions and nitrogen-centered radicals.

  • Visible Light Photoredox Catalysis
  • Organic Synthesis
  • Electrochemical Methods
  • Transition Metal Complexes
  • Radical Reactions
  • C–H Functionalization
  • Photochemical Synthesis
  • Electrocatalysis
  • Arylation Reactions
  • Nitrogen-Centered Radicals
Research works
28k
fractional, since 1950
In the world top 10%
2.7k
per year above
Top-10% rate
9.8%
share of its works in the world top 10%
Growth, 2018-21 → 2022-25
+45%
the tick is no change
Largest producer
China
53% of the 10 largest, 2022-now
Radical Photochemical Reactions

Which countries lead Radical Photochemical Reactions research?

By volume, China and the United States publish the most (3.1k and 680 works in 2022-now).

By volume, 2022-now

  1. 1 China 3.1k works
  2. 2 United States 680 works
  3. 3 India 574 works
  4. 4 Japan 375 works
  5. 5 Germany 364 works
  6. 6 France 187 works
  7. 7 Russia 149 works
  8. 8 United Kingdom 148 works
  9. 9 Spain 125 works
  10. 10 Italy 115 works

How concentrated that is

The same countries as shares of everything the list above accounts for. A node where two countries do two thirds of the work and one spread evenly across twelve read alike as a ranking and not at all alike here.

China: 52.9%United States: 11.8%India: 9.9%Japan: 6.5%6 others listed: 18.8%53%largest
China3,058 · 52.9%United States680 · 11.8%India574 · 9.9%Japan375 · 6.5%6 others listed1,088 · 18.8%

Shares of the rows listed above, not of the whole node.

Which institutions lead Radical Photochemical Reactions research?

By volume in 2022-now, Chinese Academy of Sciences publishes the most Radical Photochemical Reactions research, followed by Centre National de la Recherche Scientifique and Russian Academy of Sciences.

By volume, 2022-now

  1. 1 Chinese Academy of SciencesChina 206 works
  2. 2 Centre National de la Recherche ScientifiqueFrance 103 works
  3. 3 Russian Academy of SciencesRussia 89 works
  4. 4 Henan Normal UniversityChina 65 works
  5. 5 Sichuan UniversityChina 59 works
  6. 6 Nankai UniversityChina 58 works
  7. 7 University of Chinese Academy of SciencesChina 53 works
  8. 8 Zhejiang University of TechnologyChina 48 works
  9. 9 Zhengzhou UniversityChina 48 works
  10. 10 Lanzhou UniversityChina 45 works

Who are the leading researchers in Radical Photochemical Reactions?

The most-cited researchers publishing on Radical Photochemical Reactions include Michaël Grätzel, Jeremy Grimshaw and George M. Whitesides.

  1. 1 Michaël Grätzel Switzerland 458k citations
  2. 2 Jeremy Grimshaw Canada 281k citations
  3. 3 George M. Whitesides United States 267k citations
  4. 4 Wei Huang China 267k citations
  5. 5 Ben Zhong Tang China 261k citations
  6. 6 Donald G. Truhlar United States 230k citations
  7. 7 Stefan Grimme Germany 224k citations
  8. 8 Kai You Wang China 224k citations
  9. 9 George M. Sheldrick Germany 220k citations
  10. 10 Jiaguo Yu China 207k citations

Ranked by citations received across their whole record, among researchers with at least three works on this topic.

What are the most cited papers in Radical Photochemical Reactions?

The most cited paper in Radical Photochemical Reactions is "Visible Light Photoredox Catalysis with Transition Metal Complexes: Applications in Organic Synthesis" (Christopher K. Prier, Danica A. Rankic, David W. C. MacMillan, 2013), with 9,625 citations. Next come "Organic Photoredox Catalysis" (6,360) and "Visible light photoredox catalysis: applications in organic synthesis" (4,174).

Most cited papers
#PaperReleasedCitations
1 Visible Light Photoredox Catalysis with Transition Metal Complexes: Applications in Organic Synthesis Christopher K. Prier, Danica A. Rankic, David W. C. MacMillan · Chemical Reviews ReviewOpen access 19 Mar 2013 9,625
2 Organic Photoredox Catalysis Nathan A. Romero, David A. Nicewicz · Chemical Reviews Review 10 Jun 2016 6,360
3 Visible light photoredox catalysis: applications in organic synthesis Jagan M. R. Narayanam, Corey R. J. Stephenson · Chemical Society Reviews Review 8 Jun 2010 4,174
4 Synthetic Organic Electrochemical Methods Since 2000: On the Verge of a Renaissance Ming Yan, Yu Kawamata, Phil S. Baran · Chemical Reviews ReviewOpen access 9 Oct 2017 3,895
5 Photoredox Catalysis in Organic Chemistry Megan H. Shaw, Jack Twilton, David W. C. MacMillan · The Journal of Organic Chemistry Open access Aug 2016 3,239
All 100 most cited papers, with filters and sorting

Where is Radical Photochemical Reactions research done?

The largest centres of Radical Photochemical Reactions research in 2022-now are Beijing (China), Shanghai (China), Nanjing (China) and Hangzhou (China). Among places with at least 20 works in it, it is an unusually large share of all research in Xinxiang, Taizhou and Regensburg.

Largest cities, 2022-now

  1. 1 BeijingChina 324 works
  2. 2 ShanghaiChina 220 works
  3. 3 NanjingChina 192 works
  4. 4 HangzhouChina 142 works
  5. 5 WuhanChina 128 works
  6. 6 GuangzhouChina 105 works
  7. 7 TianjinChina 100 works
  8. 8 TokyoJapan 95 works
  9. 9 ChengduChina 91 works
  10. 10 HefeiChina 90 works

Where it is the local speciality

  1. XinxiangCN · 69.2 works38×
  2. TaizhouCN · 25.1 works28×
  3. RegensburgDE · 32.4 works14×
  4. MünsterDE · 44.0 works12×
← less than its size predicts1×more →

Location quotient: how much more of its research is in Radical Photochemical Reactions than the world average.

See Radical Photochemical Reactions on the map

Where is the best place to study Radical Photochemical Reactions?

Among universities, judged by research, Princeton University, University of Münster and Henan Normal University score highest, combining excellence, specialisation, size, growth and international reach. Research strength is one signal when choosing where to study; it does not measure teaching.

0%20%40%mean 22.66%fractional works in this field (log) →share of work in the world top 10% →Princeton UniversityUniversity of MünsterNankai UniversityHenan Normal Univers…
above the meannear itbelow it

One dot per university in the first ten of the table below, at the default weights. The upper left is the interesting corner: small places doing unusually strong work.

Excellenceshare of its work in the world top 10%, 2022-now and all time averaged
40%
Specialisationhow much of its work is in this field, counted up to 10× the world share
10%
Sizeits output in this field, on a log scale
30%
Growthoutput growth, counted from -20% to +20%
10%
Internationalshare of its work with a co-author abroad
10%
Each slider sets a weight; the share it gets of the score is beside it.
#UniversityScoreTop 10%SpecialisationWorksGrowth
1Princeton UniversityUnited States 68.339.1%8.9×22 -17.2%
2University of MünsterGermany 65.426.2%17.1×41 -9.8%
3Henan Normal UniversityChina 65.114.8%58.7×66 +358.4%
4Nankai UniversityChina 64.616.7%15.1×58 +61.7%
5Wuhan UniversityChina 62.420.0%5.4×43 +40.6%
6Southern University of Science and TechnologyChina 62.120.8%8.4×25 +35.2%
7Cornell UniversityUnited States 61.435.7%2.5×18 +41.6%
8Xiamen UniversityChina 60.320.7%7.0×34 +71.2%
9King Abdullah University of Science and TechnologySaudi Arabia 59.421.4%9.2×14 +48.7%
10University of Chinese Academy of SciencesChina 58.711.2%5.8×53 +38.6%

Universities only. The score blends excellence (40%), size (30%), specialisation (10%), growth (10%), international reach (10%), 2022-now; growth compares 2018-21 with 2022-25 and counts up to +20%, since a jump from a small base is mostly noise.

Every institution in Radical Photochemical Reactions, country by country

Is Radical Photochemical Reactions research growing?

Output in 2022-2025 was 45% higher than in 2018-2021, peaking in 2025. The fastest-growing topics are Radical Photochemical Reactions.

still counting19801990200020102020
grewheldshrank

The same series as a ribbon: one cell per year, darker for more. The line above answers how much; this answers when.

Its share of all research

Growing output can still be a shrinking share: all of science grows. This is Radical Photochemical Reactions as a percentage of every work published that year, 0.026% in 2024.

still counting0.025%0.050%0.075%Radical Photochemical Reactions0.027% in 202519801990200020102020

Fractional works of Radical Photochemical Reactions over all fractional works that year. How the balance of science has shifted.

How much of it reaches the world top 10%

Year by year.

still counting5%10%15%Radical Photochemical Reactions9.6% in 2025200020102020

Of each year's works in it, the share that reached the world's 10% most cited for their field and year. A field is the world for its own topics, so there is no other line to hold it against.

Which topics inside it are moving

Growth and decline on one axis around a shared zero. Two lists side by side hide the thing that matters: whether the growth dwarfs the decline, or the other way round.

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