2012
DOI: 10.1021/jp3051998
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Odd–Even Effect in the Polymorphism of Self-Assembled Monolayers of Biphenyl-Substituted Alkaneselenolates on Au(111)

Abstract: Self-assembled monolayers (SAMs) of ω-(4′-methylbiphenyl-4-yl) alkaneselenolates CH 3 (C 6 H 4 ) 2 (CH 2 ) n Se − (BPnSe, n = 2− 6) on Au(111) substrates, prepared in solution at elevated temperature (333 K), were studied using scanning tunneling microscopy (STM). Molecularly resolved images reveal that even-numbered BPnSe SAMs form two or three different coexisting phases, including the one observed at room temperature. In contrast, odd-numbered species exhibit only a single phase, which is the same as the on… Show more

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Cited by 20 publications
(39 citation statements)
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“…The latter was particular the case for the aromatic SAMs on Au(111), including those with the phenyl, biphenyl and anthracene backbone. 35,37,[40][41][42]44 For these monolayers, a significant improvement of the quality in terms of the structural perfection, domain size, and long-range order was observed. This was explained by the ability of the selenolates to adjust the surface lattice of the substrate to the most favorable 2D arrangement 35,40,44 or, alternatively, by a smaller corrugation of the binding energy surface for selenolates on Au(111) as compared to thiolates.…”
mentioning
confidence: 99%
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“…The latter was particular the case for the aromatic SAMs on Au(111), including those with the phenyl, biphenyl and anthracene backbone. 35,37,[40][41][42]44 For these monolayers, a significant improvement of the quality in terms of the structural perfection, domain size, and long-range order was observed. This was explained by the ability of the selenolates to adjust the surface lattice of the substrate to the most favorable 2D arrangement 35,40,44 or, alternatively, by a smaller corrugation of the binding energy surface for selenolates on Au(111) as compared to thiolates.…”
mentioning
confidence: 99%
“…35,37,[40][41][42]44 For these monolayers, a significant improvement of the quality in terms of the structural perfection, domain size, and long-range order was observed. This was explained by the ability of the selenolates to adjust the surface lattice of the substrate to the most favorable 2D arrangement 35,40,44 or, alternatively, by a smaller corrugation of the binding energy surface for selenolates on Au(111) as compared to thiolates. 37,41,40,44 In spite of the general agreement regarding the quality improvement upon the use of selenium instead of sulfur as the headgroup, there is still a controversy regarding the strength of the headgroup-substrate bond for the thiol-based and selenol-based SAMs on Au(111).…”
mentioning
confidence: 99%
“…In addition, there are other intrinsic physico‐chemical properties of the α,ω,‐alkanedicarboxylic acids due to the odd‐even effect, which is quite well established in the literature . This effect plays an important role in the regular variations of different properties of compounds: melting points, solubility, nanocalorimetry, electrochemical, the emulsifying ability of some surfactants or structural self‐assembling . It is noteworthy that the odd‐even effect arises from a difference in the packing mode between odd‐odd or even‐even carbon members of a given homologous series …”
Section: Introductionmentioning
confidence: 95%
“…[3][4][5] This effect plays an important role in the regular variations of different properties of compounds: melting points, [3,5,6] solubility, [3] nanocalorimetry, [7] electrochemical, [8,9] the emulsifying ability of some surfactants [9] or structural selfassembling. [8,[10][11][12] It is noteworthy that the odd-even effect arises from a difference in the packing mode between odd-odd or even-even carbon members of a given homologous series. [4][5][6]13] According to the "parallelogram-trapezoid model" proposed by Thalladi et al, [3] the even carbon members are arranged in such a way that the repulsive interactions between chains are decreased, leading to a more stable packing pattern.…”
Section: Introductionmentioning
confidence: 99%
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