Matches in SemOpenAlex for { <https://semopenalex.org/work/W1980586543> ?p ?o ?g. }
- W1980586543 endingPage "8565" @default.
- W1980586543 startingPage "8554" @default.
- W1980586543 abstract "We describe in this paper the synthesis, crystallization, and solid-state NMR dynamics of molecules intended to emulate the structure and function of macroscopic compasses. The desired structures consist of polar pyridine (2) and pyridazine (3) groups as well as their corresponding N-oxides (2O and 3O), each linked axially to two bulky triphenyl methyl groups by 1,4-triple bonds. The structures are such that the central polar heterocycles may rotate about the dialkyne axle while being sterically shielded by the two trityl groups. In addition to the synthesis of samples with natural isotopic abundance, we describe the preparation of 2-d2 and 3-d30, one labeled with deuteria in the pyridine rotator and the other fully deuterated in the two trityl groups in the stator. Crystal structures of 2 and 3 revealed packing motifs analogous to those previously reported for samples prepared with substituted phenylene rotators. While solid-state NMR measurements by 13C CPMAS NMR revealed insufficient chemical shift dispersion for a dynamic characterization of the rotation of compounds 2 and 3 (including 3-d30), the use of quadrupolar echo 2H NMR methods with 2-d2 revealed a rotational site exchange with a barrier of ca. 8.5 kcal/mol (35.5 kJ mol−1) for the pyridine group in 2." @default.
- W1980586543 created "2016-06-24" @default.
- W1980586543 creator A5001009717 @default.
- W1980586543 creator A5003699817 @default.
- W1980586543 creator A5008759983 @default.
- W1980586543 creator A5026443615 @default.
- W1980586543 creator A5070479287 @default.
- W1980586543 date "2009-10-22" @default.
- W1980586543 modified "2023-10-15" @default.
- W1980586543 title "Synthesis, Characterization, and Rotational Dynamics of Crystalline Molecular Compasses with N-Heterocyclic Rotators" @default.
- W1980586543 cites W1481782187 @default.
- W1980586543 cites W189293514 @default.
- W1980586543 cites W1964452267 @default.
- W1980586543 cites W1969727957 @default.
- W1980586543 cites W1972044652 @default.
- W1980586543 cites W1973054489 @default.
- W1980586543 cites W1975217371 @default.
- W1980586543 cites W1980267233 @default.
- W1980586543 cites W1980746574 @default.
- W1980586543 cites W1980988654 @default.
- W1980586543 cites W1981936908 @default.
- W1980586543 cites W1983993646 @default.
- W1980586543 cites W1984723052 @default.
- W1980586543 cites W1987549717 @default.
- W1980586543 cites W1996037194 @default.
- W1980586543 cites W2001034254 @default.
- W1980586543 cites W2001187895 @default.
- W1980586543 cites W2007697592 @default.
- W1980586543 cites W2011105629 @default.
- W1980586543 cites W2013548035 @default.
- W1980586543 cites W2017227453 @default.
- W1980586543 cites W2020238342 @default.
- W1980586543 cites W2023184248 @default.
- W1980586543 cites W2024536147 @default.
- W1980586543 cites W2025421870 @default.
- W1980586543 cites W2028336191 @default.
- W1980586543 cites W2031907429 @default.
- W1980586543 cites W2038643035 @default.
- W1980586543 cites W2041458518 @default.
- W1980586543 cites W2041844627 @default.
- W1980586543 cites W2044571535 @default.
- W1980586543 cites W2050074677 @default.
- W1980586543 cites W2052632992 @default.
- W1980586543 cites W2055795095 @default.
- W1980586543 cites W2058387389 @default.
- W1980586543 cites W2058912931 @default.
- W1980586543 cites W2063334178 @default.
- W1980586543 cites W2064786293 @default.
- W1980586543 cites W2064866349 @default.
- W1980586543 cites W2067049601 @default.
- W1980586543 cites W2067365086 @default.
- W1980586543 cites W2067554041 @default.
- W1980586543 cites W2067822713 @default.
- W1980586543 cites W2075470589 @default.
- W1980586543 cites W2077856795 @default.
- W1980586543 cites W2078369241 @default.
- W1980586543 cites W2078818572 @default.
- W1980586543 cites W2080789552 @default.
- W1980586543 cites W2084912049 @default.
- W1980586543 cites W2085446754 @default.
- W1980586543 cites W2086945873 @default.
- W1980586543 cites W2099392831 @default.
- W1980586543 cites W2122220082 @default.
- W1980586543 cites W2130989252 @default.
- W1980586543 cites W2131350133 @default.
- W1980586543 cites W2137726920 @default.
- W1980586543 cites W2147440332 @default.
- W1980586543 cites W2148405700 @default.
- W1980586543 cites W2149381236 @default.
- W1980586543 cites W2164391612 @default.
- W1980586543 cites W2173632974 @default.
- W1980586543 cites W2323262150 @default.
- W1980586543 cites W2330557696 @default.
- W1980586543 cites W246782882 @default.
- W1980586543 cites W2949437940 @default.
- W1980586543 cites W2952764647 @default.
- W1980586543 cites W4255519670 @default.
- W1980586543 cites W4296979420 @default.
- W1980586543 cites W4299908858 @default.
- W1980586543 cites W4384652465 @default.
- W1980586543 doi "https://doi.org/10.1021/jo901261j" @default.
- W1980586543 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19848383" @default.
- W1980586543 hasPublicationYear "2009" @default.
- W1980586543 type Work @default.
- W1980586543 sameAs 1980586543 @default.
- W1980586543 citedByCount "33" @default.
- W1980586543 countsByYear W19805865432012 @default.
- W1980586543 countsByYear W19805865432013 @default.
- W1980586543 countsByYear W19805865432014 @default.
- W1980586543 countsByYear W19805865432015 @default.
- W1980586543 countsByYear W19805865432016 @default.
- W1980586543 countsByYear W19805865432018 @default.
- W1980586543 countsByYear W19805865432019 @default.
- W1980586543 countsByYear W19805865432020 @default.
- W1980586543 countsByYear W19805865432021 @default.
- W1980586543 countsByYear W19805865432022 @default.
- W1980586543 crossrefType "journal-article" @default.
- W1980586543 hasAuthorship W1980586543A5001009717 @default.