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Ajai K. Singh

D-Index & Metrics

Chemistry

D-Index
53
Citations
9189
World Ranking
13162
National Ranking
222

Ajai K. Singh publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Ajai K. Singh sits on this spectrum.

61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61 publications 1,295+

This scientist: 227 publications — 42nd percentile

42% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

Ajai K. Singh D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Ajai K. Singh sits on this spectrum.

40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40 D-Index 159+

This scientist: 53 D-Index — 28th percentile

28% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

Overview

Ajai K. Singh is affiliated with the Indian Institute of Technology Delhi in India. Their research primarily spans the fields of Materials Science and Chemistry with a particular focus on materials chemistry and organic chemistry.

The scientist has contributed extensively to subfields such as materials chemistry, organic chemistry, toxicology, inorganic chemistry, and renewable energy, sustainability, and the environment. Their work covers several specialized topics, including:

  • X-ray Diffraction in Crystallography
  • Crystallization and Solubility Studies
  • Nanocluster Synthesis and Applications
  • Catalytic Cross-Coupling Reactions
  • Sulfur-Based Synthesis Techniques
  • Organoselenium and Organotellurium Chemistry
  • Nanomaterials for Catalytic Reactions

Ajai K. Singh has collaborated frequently with several coauthors, including Preeti Oswal, Gyandshwar Kumar Rao, Arun Kumar, Aayushi Arora, and Sushil Kumar, reflecting an active engagement in collaborative research networks.

Their recent scholarly publications include:

  • "Catalytically active nanosized Pd9Te4(telluropalladinite) and PdTe (kotulskite) alloys: first precursor-architecture controlled synthesis using palladium complexes of organotellurium compounds as single source precursors," 2021, RSC Advances
  • "Organoselenium ligand-stabilized copper nanoparticles: Development of a magnetically separable catalytic system for efficient, room temperature and aqueous phase reduction of nitroarenes," 2021, Inorganica Chimica Acta
  • "Catalysis with magnetically retrievable and recyclable nanoparticles layered with Pd(0) for C-C/C-O coupling in water," 2020, RSC Advances
  • "Easily synthesizable benzothiazole based designers palladium complexes for catalysis of Suzuki coupling: Controlling effect of aryl substituent of ligand on role and composition of insitu generated binary nanomaterial (PdS or Pd16S7)," 2020, Catalysis Communications
  • "Click chemistry in the synthesis of catalytically relevant organoselenium compounds: development and applications of catalysts for organic synthesis," 2022, New Journal of Chemistry

Their frequent publication venues include:

  • The Cambridge Structural Database
  • New Journal of Chemistry
  • RSC Advances
  • ChemistrySelect
  • Inorganica Chimica Acta

Best Publications

  • Amberlite XAD-2 functionalized with o-aminophenol: synthesis and applications as extractant for copper(II), cobalt(II), cadmium(II), nickel(II), zinc(II) and lead(II).

    Manjeet Kumar;D.P.S Rathore;Ajai K Singh

  • Preconcentration of lead with Amberlite XAD-2 and Amberlite XAD-7 based chelating resins for its determination by flame atomic absorption spectrometry.

    P K Tewari;Ajai K Singh

  • Metal ion enrichment with Amberlite XAD-2 functionalized with Tiron: analytical applications

    Manjeet Kumar;D. P. S. Rathore;Ajai K. Singh

  • Synthesis, characterization and applications of pyrocatechol modified amberlite XAD-2 resin for preconcentration and determination of metal ions in water samples by flame atomic absorption spectrometry (FAAS).

    Pankaj Kumar Tewari;Ajai Kumar Singh

  • Silica gel functionalized with resacetophenone: synthesis of a new chelating matrix and its application as metal ion collector for their flame atomic absorption spectrometric determination

    Anupama Goswami;Ajai K Singh

  • Amberlite XAD-7 impregnated with Xylenol Orange: a chelating collector for preconcentration of Cd(II), Co(II), Cu(II), Ni(II), Zn(II) and Fe(III) ions prior to their determination by flame AAS.

    Pankaj Kumar Tewari;Ajai Kumar Singh

  • Recent developments in the ligand chemistry of tellurium

    Ajai K. Singh;Shivadhar Sharma

  • Transfer Hydrogenation of Ketones and Catalytic Oxidation of Alcohols with Half-Sandwich Complexes of Ruthenium(II) Designed Using Benzene and Tridentate (S, N, E) Type Ligands (E = S, Se, Te)

    Pradhumn Singh;Ajai K. Singh

  • Organoselenium ligands in catalysis.

    Arun Kumar;Gyandshwar K. Rao;Fariha Saleem;Ajai K. Singh

  • Formation and Role of Palladium Chalcogenide and Other Species in Suzuki–Miyaura and Heck C–C Coupling Reactions Catalyzed with Palladium(II) Complexes of Organochalcogen Ligands: Realities and Speculations

    Arun Kumar;Gyandshwar Kumar Rao;Satyendra Kumar;Ajai K. Singh

  • 8-Hydroxyquinoline anchored to silica gel via new moderate size linker: synthesis and applications as a metal ion collector for their flame atomic absorption spectrometric determination

    Anupama Goswami;Ajai K. Singh;B. Venkataramani

  • Cellulose functionalized with 8-hydroxyquinoline: new method of synthesis and applications as a solid phase extractant in the determination of metal ions by flame atomic absorption spectrometry

    Vibha Gurnani;Ajai K Singh;B Venkataramani

  • Thiosalicylic acid-immobilized Amberlite XAD-2: metal sorption behaviour and applications in estimation of metal ions by flame atomic absorption spectrometry

    Pankaj Kumar Tewari;Ajai Kumar Singh

  • Pyrocatechol Violet immobilized Amberlite XAD-2: synthesis and metal-ion uptake properties suitable for analytical applications

    Reena Saxena;Ajai K. Singh

  • Palladacycle containing nitrogen and selenium: highly active pre-catalyst for the Suzuki-Miyaura coupling reaction and unprecedented conversion into nano-sized Pd17Se15.

    Gyandshwar Kumar Rao;Arun Kumar;Jahangeer Ahmed;Ajai Kumar Singh

  • 1,8-Dihydroxyanthraquinone anchored on silica gel: synthesis and application as solid phase extractant for lead(II), zinc(II) and cadmium(II) prior to their determination by flame atomic absorption spectrometry

    Anupama Goswami;Ajai K Singh

  • Palladium(II), platinum(II), ruthenium(II) and mercury(II) complexes of potentially tridentate Schiff base ligands of (E, N, O) type (E = S, Se, Te): Synthesis, crystal structures and applications in Heck and Suzuki coupling reactions

    Arun Kumar;Monika Agarwal;Ajai K. Singh;R.J. Butcher

  • Pyrogallol immobilized Amberlite XAD-2: A newly designed collector for enrichment of metal ions prior to their determination by flame atomic absorption spectrometry

    Manjeet Kumar;D. P. S. Rathore;Ajai K. Singh

  • Synthesis of a chelating polymer matrix by immobilizing Alizarin Red-S on Amberlite XAD-2 and its application to the preconcentration of lead(II), cadmium(II), zinc(II) and nickel(II)

    Reena Saxena;Ajai K. Singh;S.S. Sambi

  • Amberlite XAD-2 functionalized with chromotropic acid: synthesis of a new polymer matrix and its applications in metal ion enrichment for their determination by flame atomic absorption spectrometry

    Pankaj Kumar Tewari;Ajai Kumar Singh

Frequent Co-Authors

Mark E. Light
Mark E. Light University of Southampton
Michael B. Hursthouse
Michael B. Hursthouse University of Southampton
Ray J. Butcher
Ray J. Butcher Howard University
Jahangeer Ahmed
Jahangeer Ahmed King Saud University
Karl W. Törnroos
Karl W. Törnroos University of Bergen
Ashok K. Ganguli
Ashok K. Ganguli Indian Institute of Technology Delhi
Satyendra Kumar
Satyendra Kumar University at Albany, State University of New York
Anil K. Mishra
Anil K. Mishra Defence Research and Development Organisation
Anjali Goswami
Anjali Goswami Natural History Museum

External Links

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Best Scientists Citing Ajai K. Singh

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William Levason

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T. Prasada Rao

T. Prasada Rao

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Valentine P. Ananikov

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Publications: 10

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Mehrorang Ghaedi

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