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Showing 1 to 12 of 82 entries
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Hybrid Group IV Nanophotonic Structures Incorporating Diamond Silicon-Vacancy Color Centers.

Nano letters

Zhang JL, Ishiwata H, Babinec TM, Radulaski M, Müller K, Lagoudakis KG, Dory C, Dahl J, Edgington R, Soulière V, Ferro G, Fokin AA, Schreiner PR, Shen ZX, Melosh NA, Vučković J.
PMID: 26695059
Nano Lett. 2016 Jan 13;16(1):212-7. doi: 10.1021/acs.nanolett.5b03515. Epub 2015 Dec 24.

We demonstrate a new approach for engineering group IV semiconductor-based quantum photonic structures containing negatively charged silicon-vacancy (SiV(-)) color centers in diamond as quantum emitters. Hybrid diamond-SiC structures are realized by combining the growth of nano- and microdiamonds on...

Intramolecular London Dispersion Interaction Effects on Gas-Phase and Solid-State Structures of Diamondoid Dimers.

Journal of the American Chemical Society

Fokin AA, Zhuk TS, Blomeyer S, Pérez C, Chernish LV, Pashenko AE, Antony J, Vishnevskiy YV, Berger RJF, Grimme S, Logemann C, Schnell M, Mitzel NW, Schreiner PR.
PMID: 29037036
J Am Chem Soc. 2017 Nov 22;139(46):16696-16707. doi: 10.1021/jacs.7b07884. Epub 2017 Nov 08.

The covalent diamantyl (C

SF5-Enolates in Ti(IV)-Mediated Aldol Reactions.

The Journal of organic chemistry

Ponomarenko MV, Grabowsky S, Pal R, Röschenthaler GV, Fokin AA.
PMID: 27384450
J Org Chem. 2016 Aug 05;81(15):6783-91. doi: 10.1021/acs.joc.6b00946. Epub 2016 Jul 18.

The F···Ti bonding in the transition structures determines high trans- and syn-diastereoselectivities for aldol reactions of SF5-acetates with aldehydes in the presence of TiCl4 in the non-nucleophilic solvent CH2Cl2. Such bonding is canceled in nucleophilic solvents where opposite cis-stereochemistry...

Which electron count rules are needed for four-center three-dimensional aromaticity?.

Chemistry (Weinheim an der Bergstrasse, Germany)

Fokin AA, Kiran B, Bremer M, Yang X, Jiao H, von Rague Schleyer P, Schreiner PR.
PMID: 10839179
Chemistry. 2000 May 02;6(9):1615-28. doi: 10.1002/(sici)1521-3765(20000502)6:9<1615::aid-chem1615>3.3.co;2-f.

A series of charged and neutral four-center n-electron (4c-ne, n = 1-4) molecules based on the adamantane framework, but which include combinations of boron, nitrogen, and phosphorus atoms at bridgehead positions, were studied computationally at the B3LYP/6-31G* level of...

A consecutive double-Criegee rearrangement using TFPAA: stepwise conversion of homoadamantane to oxahomoadamantanes.

The Journal of organic chemistry

Krasutsky PA, Kolomitsyn IV, Kiprof P, Carlson RM, Sydorenko NA, Fokin AA.
PMID: 11262116
J Org Chem. 2001 Mar 09;66(5):1701-7. doi: 10.1021/jo001219z.

Rearrangement of 4-methylhomoadamantan-4-ol (1) with trifluoroperacetic acid (TFPAA) in trifluoroacetic acid (TFAA) proceeds with the formation of 4-oxahomoadamantane 6 and its derivatives (4 and 5). 2-exo-Hydroxy-4-oxahomoadamantane (5) and 6 were identified as a result of consecutive O-insertion Criegee rearrangement...

Selective radical reactions in multiphase systems: phase-transfer halogenations of alkanes.

Chemistry (Weinheim an der Bergstrasse, Germany)

Schreiner PR, Lauenstein O, Butova ED, Gunchenko PA, Kolomitsin IV, Wittkopp A, Feder G, Fokin AA.
PMID: 11775673
Chemistry. 2001 Dec 03;7(23):4996-5003. doi: 10.1002/1521-3765(20011203)7:23<4996::aid-chem4996>3.0.co;2-p.

The present paper shows that selective radical reactions can be initiated and carried out in multiphase systems. This concept is applied to the selective functionalization of unactivated aliphatic hydrocarbons, which may be linear, branched, and (poly)cyclic, strained as well...

Delocalizations in sigma-radical cations: the intriguing structures of ionized [n]rotanes.

Organic letters

Fokin AA, Schreiner PR, Kozhushkov SI, Sattelmeyer KW, Schaefer HF, De Meijere A.
PMID: 12605493
Org Lett. 2003 Mar 06;5(5):697-700. doi: 10.1021/ol027479f.

Highly symmetric aliphatic hydrocarbons such as D(4h)-[4]rotane do not necessarily have degenerate HOMOs. According to our predictions based on high-level computations, its radical cation should display a highly delocalized D(4h)-symmetric structure, in contrast to its Jahn-Teller distorted cousin, the...

How accurate are DFT treatments of organic energies?.

Organic letters

Wodrich MD, Corminboeuf C, Schreiner PR, Fokin AA, von Ragué Schleyer P.
PMID: 17417862
Org Lett. 2007 May 10;9(10):1851-4. doi: 10.1021/ol070354w. Epub 2007 Apr 07.

Increasing awareness that popular functionals fail to describe many energies accurately has ended expectations of black-box DFT usage. The performance of nine density functionals, compared by computing the bond separation energies of 72 illustrative hydrocarbons with available experimental data,...

Diamonds are a chemist's best friend: diamondoid chemistry beyond adamantane.

Angewandte Chemie (International ed. in English)

Schwertfeger H, Fokin AA, Schreiner PR.
PMID: 18081112
Angew Chem Int Ed Engl. 2008;47(6):1022-36. doi: 10.1002/anie.200701684.

Marilyn Monroe knew that "diamonds are a girl's best friend" but, in the meantime, many chemists have realized that they are also extremely attractive objects in contemporary chemistry. The chemist's diamonds are usually quite small (herein: nanometer-sized "diamondoids") and...

Functionalized nanodiamonds part 3: thiolation of tertiary/bridgehead alcohols.

Organic letters

Tkachenko BA, Fokina NA, Chernish LV, Dahl JE, Liu S, Carlson RM, Fokin AA, Schreiner PR.
PMID: 16623546
Org Lett. 2006 Apr 27;8(9):1767-70. doi: 10.1021/ol053136g.

[reaction: see text] Treatment of acyclic as well as polycyclic tertiary mono- and dihydroxy hydrocarbon derivatives with thiourea in the presence of hydrobromic and acetic acid represents a convenient one-step route to the respective tertiary thiols and dithiols. This...

Reactivities of the prism-shaped diamondoids [1(2)3]tetramantane and [12312]hexamantane (cyclohexamantane).

Chemistry (Weinheim an der Bergstrasse, Germany)

Fokin AA, Tkachenko BA, Fokina NA, Hausmann H, Serafin M, Dahl JE, Carlson RM, Schreiner PR.
PMID: 19229930
Chemistry. 2009;15(15):3851-62. doi: 10.1002/chem.200801867.

Various functional groups have been incorporated into the structures of the naturally occurring diamondoids [1(2)3]tetramantane and [12312]hexamantane (cyclohexamantane), which represent hydrogen-terminated prism-shaped nanodiamonds. The selectivities of the C-H substitutions in [1(2)3]tetramantane depend on the reagent employed and give products...

Functionalized nanodiamonds part I. An experimental assessment of diamantane and computational predictions for higher diamondoids.

Chemistry (Weinheim an der Bergstrasse, Germany)

Fokin AA, Tkachenko BA, Gunchenko PA, Gusev DV, Schreiner PR.
PMID: 16196063
Chemistry. 2005 Nov 18;11(23):7091-101. doi: 10.1002/chem.200500031.

The structures, strain energies, and enthalpies of formation of diamantane 1, triamantane 2, isomeric tetramantanes 3-5, T(d)-pentamantane 6, and D(3d)-hexamantane 7, and the structures of their respective radicals, cations, as well as radical cations, were computed at the B3LYP/6-31G*...

Showing 1 to 12 of 82 entries