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Molecular Spectroscopy and Structure

Molecular Spectroscopy and Structure is a research topic within Spectroscopy. Science Explorer counts 27k research works in it since 1950. 9.9% of them reached the world's top 10% most cited for their field and year.

This cluster of papers focuses on the use of rotational spectroscopy, particularly broadband microwave and Fourier transform techniques, to determine the molecular structures of various compounds in the gas phase. The studies explore topics such as hydrogen bonding, conformational dynamics, internal rotation, and torsional states of molecules.

  • Rotational Spectroscopy
  • Molecular Structure
  • Broadband Microwave Spectroscopy
  • Gas Phase
  • Hydrogen Bonds
  • Conformational Dynamics
  • Chirped-Pulse Excitation
  • Fourier Transform Microwave Spectroscopy
  • Internal Rotation
  • Torsional States
Research works
27k
fractional, since 1950
In the world top 10%
2.7k
per year above
Top-10% rate
9.9%
share of its works in the world top 10%
Growth, 2018-21 → 2022-25
-14%
the tick is no change
Largest producer
United States
25% of the 10 largest, 2022-now
Molecular Spectroscopy and Structure

Which countries lead Molecular Spectroscopy and Structure research?

By volume, the United States and France publish the most (301 and 161 works in 2022-now).

By volume, 2022-now

  1. 1 United States 301 works
  2. 2 France 161 works
  3. 3 China 143 works
  4. 4 Germany 134 works
  5. 5 Russia 99 works
  6. 6 India 93 works
  7. 7 Spain 77 works
  8. 8 Japan 74 works
  9. 9 Italy 60 works
  10. 10 United Kingdom 57 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.

United States: 25.1%France: 13.5%China: 12.0%Germany: 11.2%6 others listed: 38.3%25%largest
United States301 · 25.1%France161 · 13.5%China143 · 12.0%Germany134 · 11.2%6 others listed459 · 38.3%

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

Which institutions lead Molecular Spectroscopy and Structure research?

By volume in 2022-now, Centre National de la Recherche Scientifique publishes the most Molecular Spectroscopy and Structure research, followed by Russian Academy of Sciences and Max Planck Society.

By volume, 2022-now

  1. 1 Centre National de la Recherche ScientifiqueFrance 89 works
  2. 2 Russian Academy of SciencesRussia 49 works
  3. 3 Max Planck SocietyGermany 34 works
  4. 4 Chinese Academy of SciencesChina 23 works
  5. 5 Consejo Superior de Investigaciones CientíficasSpain 22 works
  6. 6 Universidad de ValladolidSpain 18 works
  7. 7 Helmholtz Association of German Research CentresGermany 17 works
  8. 8 University of BolognaItaly 15 works
  9. 9 University of MississippiUnited States 15 works
  10. 10 Harvard UniversityUnited States 13 works

Who are the leading researchers in Molecular Spectroscopy and Structure?

The most-cited researchers publishing on Molecular Spectroscopy and Structure include John P. Perdew, George M. Whitesides and Xiaogang Wang.

  1. 1 John P. Perdew United States 436k citations
  2. 2 George M. Whitesides United States 267k citations
  3. 3 Xiaogang Wang China 260k citations
  4. 4 Rodney S. Ruoff United States 231k citations
  5. 5 Donald G. Truhlar United States 230k citations
  6. 6 Peter John Barnes United Kingdom 225k citations
  7. 7 Stefan Grimme Germany 224k citations
  8. 8 George M. Sheldrick Germany 220k citations
  9. 9 John Anthony Pople United States 202k citations
  10. 10 William A. Goddard United States 182k 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 Molecular Spectroscopy and Structure?

The most cited paper in Molecular Spectroscopy and Structure is "Self-consistent molecular orbital methods 25. Supplementary functions for Gaussian basis sets" (Michael J. Frisch, John Anthony Pople, J. Stephen Binkley, 1984), with 8,596 citations. Next come "The Hydrogen Bond in the Solid State" (6,246) and "An Extended Hückel Theory. I. Hydrocarbons" (4,626).

Most cited papers
#PaperReleasedCitations
1 Self-consistent molecular orbital methods 25. Supplementary functions for Gaussian basis sets Michael J. Frisch, John Anthony Pople, J. Stephen Binkley · The Journal of Chemical Physics Apr 1984 8,596
2 The Hydrogen Bond in the Solid State Thomas Steiner · Angewandte Chemie International Edition 2 Jan 2002 6,246
3 An Extended Hückel Theory. I. Hydrocarbons Roald Hoffmann · The Journal of Chemical Physics 15 Sep 1963 4,626
4 Application of the pople-santry-segal CNDO method to the cyclopropylcarbinyl and cyclobutyl cation and to bicyclobutane Kenneth B. Wiberg · Tetrahedron 1968 4,493
5 The Grotthuss mechanism Noam Agmon · Chemical Physics Letters Oct 1995 3,479
All 100 most cited papers, with filters and sorting

Where is Molecular Spectroscopy and Structure research done?

The largest centres of Molecular Spectroscopy and Structure research in 2022-now are Paris (France), Moscow (Russia), Tokyo (Japan) and Madrid (Spain).

Largest cities, 2022-now

  1. 1 ParisFrance 55 works
  2. 2 MoscowRussia 41 works
  3. 3 TokyoJapan 28 works
  4. 4 MadridSpain 25 works
  5. 5 BeijingChina 25 works
  6. 6 CharlottesvilleUnited States 19 works
  7. 7 CambridgeUnited States 19 works
  8. 8 ValladolidSpain 18 works
  9. 9 BolognaItaly 17 works
  10. 10 Amherst CenterUnited States 17 works
See Molecular Spectroscopy and Structure on the map

Where is the best place to study Molecular Spectroscopy and Structure?

Among universities, judged by research, Leiden University, University of Mississippi and University of Massachusetts Amherst 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 18.83%fractional works in this field (log) →share of work in the world top 10% →Leiden UniversityScuola Normale Super…University of Massac…University of Missis…
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
1Leiden UniversityNetherlands 72.739.8%16.8×12 -26.5%
2University of MississippiUnited States 60.717.4%55.3×15 +53.4%
3University of Massachusetts AmherstUnited States 58.221.3%26.1×12 +88.9%
4Scuola Normale SuperioreItaly 56.438.2%111.2×8 -24.3%
5Harvard UniversityUnited States 53.020.5%3.1×13 -25.2%
6Universidad de ValladolidSpain 52.76.5%47.0×18 -6.7%
7University of VirginiaUnited States 46.316.6%13.5×11 +3.1%
8University of BolognaItaly 46.28.8%14.1×15 -19.1%
9Université Paris-SaclayFrance 44.411.9%10.2×8 +25.7%
10University of Wisconsin–MadisonUnited States 44.07.3%9.1×11 +23.6%

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 Molecular Spectroscopy and Structure, country by country

Is Molecular Spectroscopy and Structure research growing?

Output in 2022-2025 was 14% lower than in 2018-2021, peaking in 2006.

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 Molecular Spectroscopy and Structure as a percentage of every work published that year, 0.0062% in 2024.

still counting0.050%0.10%0.15%Molecular Spectroscopy and Structure0.0046% in 202519801990200020102020

Fractional works of Molecular Spectroscopy and Structure 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%Molecular Spectroscopy and Structure9.5% 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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