Functional Polymeric Nanostructures Prepared by Self‐Assembly and Beyond

O’Reilly, Rachel K.

doi:10.1002/9780470825150.ch17

Cited by 1 publication

(2 citation statements)

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“…Reverse micelles allow for the accommodation of the hydrophilic reagents into their core and their subsequent suspension in hydrophobic solvents. This possibility may be important for industrial applications . The presence of bis(propyl)tetramethyldisiloxane in our structure might give it increased solubility in nonpolar environment where only few metal complexes can be dissolved and homogeneously catalyze certain reactions.…”

Section: Resultsmentioning

confidence: 99%

“…This possibility may be important for industrial applications. 48 The presence of bis(propyl)tetramethyldisiloxane in our structure might give it increased solubility in nonpolar environment where only few metal complexes can be dissolved and homogeneously catalyze certain reactions. Such an environment is supercritical carbon dioxide (scCO 2 ), in the latest period increasingly regarded as nontoxic, nonflammable, eco-friendly, and relatively cheap solvent.…”

Section: S Y N T H E S I S a N D C H A R A C T E R I Z A T I O N S Y...mentioning

confidence: 99%

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Oxime-Bridged Mn₆ Clusters Inserted in One-Dimensional Coordination Polymer

Zaltariov¹,

Cazacu²,

Săcărescu³

et al. 2016

Macromolecules

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The reaction of MnCl 2 •4H 2 O with salicylaldoxime (H 2 salox) and the sodium salt of 1,3-bis(carboxypropyl)tetramethyldisiloxane (H 2 L) in a 1:1:1 molar ratio led to the self-assembly of {[Mn 6 O 2 (salox) 6 (H 2 salox)(H 2 O) 3 (μ-L)]H 2 salox• 1.2H 2 O} n , a 1D coordination polymer consisting of hexamanganese(III) salicylaldoximate cluster as secondary building unit (SBU) and tetramethyldisiloxane-based dicarboxylate linker, namely, 1,3-bis(carboxypropyl)tetramethyldisiloxane. The structure of the compound was established by single crystal X-ray diffraction. The Mn(III) clusters consist of two staggered μ 3 -oxo-bridged Mn 3 triangles held together by the oxygen atoms of the oxime groups. Because of Jahn−Teller distortion, the Mn−O distances reach 2.5 Å for the oxygen atoms located above and below the triangles mean planes. The compound showed a glass transition peak at around 14 °C in the differential scanning calorimetry (DSC) curve. The magnetic susceptibility data were fitted with a set of three intracluster antiferromagnetic exchange interaction coupling constants: J 1 = −0.65 cm −1 , J 2 = −1.5 cm −1 , and J 3 = −0.9 cm −1 . The ac magnetic susceptibility measurements in the 2−5 K temperature range reveal a frequencydependent behavior indicative of a slow relaxation of magnetization at low temperature. The coexistence of the lypophilic 1,3-bis(propyl)tetramethyldisiloxane moieties and hydrophilic polar SBUs confers to the structure an amphiphilic character. Dynamic light scattering (DLS), small-angle X-ray scattering (SAXS), and transmission (TEM) and scanning (SEM) electron microscopies demonstrate that in dimethylformamide (DMF) the coordination polymer organizes as micelles, whereas in chloroform it tends to form inverse micelles and vesicles.

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Section: Resultsmentioning

confidence: 99%

Section: S Y N T H E S I S a N D C H A R A C T E R I Z A T I O N S Y...mentioning

confidence: 99%