M. A. Keegstra

693 total citations
16 papers, 562 citations indexed

About

M. A. Keegstra is a scholar working on Organic Chemistry, Inorganic Chemistry and Polymers and Plastics. According to data from OpenAlex, M. A. Keegstra has authored 16 papers receiving a total of 562 indexed citations (citations by other indexed papers that have themselves been cited), including 13 papers in Organic Chemistry, 4 papers in Inorganic Chemistry and 3 papers in Polymers and Plastics. Recurrent topics in M. A. Keegstra's work include Chemical Synthesis and Reactions (8 papers), Catalytic Cross-Coupling Reactions (5 papers) and Sulfur-Based Synthesis Techniques (4 papers). M. A. Keegstra is often cited by papers focused on Chemical Synthesis and Reactions (8 papers), Catalytic Cross-Coupling Reactions (5 papers) and Sulfur-Based Synthesis Techniques (4 papers). M. A. Keegstra collaborates with scholars based in Netherlands, Germany and Belgium. M. A. Keegstra's co-authors include L. Brandsma, Kläus Müllen, Johann Diedrich Brand, Mike Wehmeier, Vivekanantan S. Iyer, Steven De Feyter, Frans C. De Schryver, H. D. Verkruijsse, Ullrich Scherf and Věra Cimrová and has published in prestigious journals such as Tetrahedron, Synthesis and Macromolecular Chemistry and Physics.

In The Last Decade

M. A. Keegstra

16 papers receiving 537 citations

Peers

M. A. Keegstra

EEE

Kurt Pilgram United States

Walter Amrein Switzerland

Yasuyuki Koie Japan

Anamaria Terec Romania

Takuji Kato Japan

Shigeya Kobayashi Japan

N. Bilow United States

Bo‐Bin Jang South Korea

Christopher D. Weber United States

Jian‐Yang Cho United States

Kurt Pilgram United States

M. A. Keegstra

311 ×0.8

79 ×0.5

164 ×1.2

EEE

129 ×1.3

62 ×1.2

Citations per year, relative to M. A. Keegstra M. A. Keegstra (= 1×) peers Kurt Pilgram

Countries citing papers authored by M. A. Keegstra

Since Specialization

Citations

This map shows the geographic impact of M. A. Keegstra's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by M. A. Keegstra with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites M. A. Keegstra more than expected).

Fields of papers citing papers by M. A. Keegstra

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by M. A. Keegstra. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by M. A. Keegstra. The network helps show where M. A. Keegstra may publish in the future.

Co-authorship network of co-authors of M. A. Keegstra

This figure shows the co-authorship network connecting the top 25 collaborators of M. A. Keegstra. A scholar is included among the top collaborators of M. A. Keegstra based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with M. A. Keegstra. M. A. Keegstra is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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16 of 16 papers shown

Iyer, Vivekanantan S., Mike Wehmeier, Johann Diedrich Brand, M. A. Keegstra, & Kläus Müllen. (1997). From Hexa‐peri‐hexabenzocoronene to “Superacenes”. Angewandte Chemie International Edition in English. 36(15). 1604–1607. 156 indexed citations

Iyer, Vivekanantan S., Mike Wehmeier, Johann Diedrich Brand, M. A. Keegstra, & Kläus Müllen. (1997). Von Hexa‐peri‐hexabenzocoronen zu „Superacenen”. Angewandte Chemie. 109(15). 1676–1679. 56 indexed citations

Keegstra, M. A., Kläus Müllen, Steven De Feyter, & Frans C. De Schryver. (1996). Hexaterphenylyl‐ and Hexaquaterphenylylbenzene: The Behavior of Chromophores and Electrophores in a Restricted Space. Angewandte Chemie International Edition in English. 35(7). 774–776. 51 indexed citations

Keegstra, M. A., Steven De Feyter, Frans C. De Schryver, & Kläus Müllen. (1996). Hexaterphenylyl‐ und Hexaquaterphenylylbenzol: das Verhalten von Chromophoren und Elektrophoren auf engem Raum. Angewandte Chemie. 108(7). 830–833. 10 indexed citations

Keegstra, M. A., Věra Cimrová, Dieter Neher, & Ullrich Scherf. (1996). Synthesis and electroluminescent properties of quaterphenyl and sexiphenyl containing copolymers. Macromolecular Chemistry and Physics. 197(8). 2511–2519. 17 indexed citations

Keegstra, M. A., et al.. (1992). ChemInform Abstract: Copper(I) Halide Catalyzed Synthesis of Alkyl Aryl and Alkyl Heteroaryl Ethers.. ChemInform. 23(34). 3 indexed citations

Keegstra, M. A.. (1992). Copper catalysed preparation of vinyl ethers from unactivated vinylic halides. Tetrahedron. 48(13). 2681–2690. 22 indexed citations

Keegstra, M. A., et al.. (1992). Copper(I) halide catalysed synthesis of alkyl aryl and alkyl heteroaryl ethers. Tetrahedron. 48(17). 3633–3652. 101 indexed citations

Keegstra, M. A. & L. Brandsma. (1991). The first successful copper(I)‐catalysed alkoxydehalogenation of non‐activated aryl chlorides. Recueil des Travaux Chimiques des Pays-Bas. 110(6). 299–300. 9 indexed citations

10.

Keegstra, M. A., et al.. (1991). Efficient Procedures for 1-Bromo-1,3-Butadiene and 2-Bromo-1,3-Butadiene. Synthetic Communications. 21(5). 721–726. 14 indexed citations

11.

Verkruijsse, H. D., et al.. (1990). Nickel-Catalyzed Cyanation of 2- and 3- Bromothiophene. Synthetic Communications. 20(20). 3153–3156. 28 indexed citations

12.

Keegstra, M. A., et al.. (1990). Efficient Procedures for the Cu(I)-Catalyzed Methoxylation of 2-and 3-Bromothiophene. Synthetic Communications. 20(2). 213–216. 25 indexed citations

13.

Keegstra, M. A., et al.. (1990). Convenient Synthetic Procedures for 2-Bromofuran and 2,5-Dibromofuran. Synthetic Communications. 20(21). 3371–3374. 35 indexed citations

14.

Verkruijsse, H. D., M. A. Keegstra, & L. Brandsma. (1989). A High-Yield Preparative-Scale Method for 2-Bromofuran. Synthetic Communications. 19(5-6). 1047–1049. 5 indexed citations

15.

Брандсма, Л., et al.. (1988). An improved synthesis of the antithyroid factor DL‐goitrin. Recueil des Travaux Chimiques des Pays-Bas. 107(3). 132–133. 2 indexed citations

16.

Keegstra, M. A. & L. Brandsma. (1988). Convenient High-Yield Procedures for 2-Bromothiophene and 2,5-Dibromothiophene. Synthesis. 1988(11). 890–891. 28 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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