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    <publishedYear>2023</publishedYear>
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    <title language="eng">Suppressed Transition and Dynamic self-asembly of ionic superdiscs in cylindrical nanochannels</title>
    <abstract language="eng">Liquid crystalline mesophases in nanoconfinement exhibit intriguing phase transition behaviors and relaxation dynamics. Here, we investigate the molecular mobility and electrical conductivity of a columnar ionic liquid crystal confined in self-ordered nanoporous alumina oxide membranes of pore size ranging from 180 nm down to 25 nm. We use nano-broadband dielectric spectroscopy (BDS) and calorimetry to study the dynamics and phase behavior. Calorimetric investigation reveals a complete suppression of the columnar – isotropic transition, while the plastic crystalline – columnar transition temperature decreases with inverse pore size and deviates from the Gibbs – Thomson equation.&#13;
&#13;
For the bulk case, BDS detects two relaxation modes in the crystalline phase, the γ relaxation and the α1 relaxation, and two relaxation modes in the columnar phase, the α2 and α3 relaxation. All relaxation modes slow down for the confined case compared to the bulk. However, a new relaxation mode reflecting the interfacial layer emerges for the 80 and 25 nm. We discuss the possible molecular origins of the different relaxation modes observed. For the bulk ILC, a clear jump of 4 orders of magnitude in the absolute values of DC conductivity occurs at the transition from the plastic crystalline to hexagonal columnar phase, for the confined ILC, this transition is smooth. DC conductivity is reduced for the confined case, except for the 25nm, where the values are similar to the bulk.</abstract>
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    <author>Mohamed Aejaz Kolmangadi</author>
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      <language>eng</language>
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      <value>Ionic Liquid crystals</value>
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      <language>eng</language>
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      <value>Nanoconfinement</value>
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      <language>eng</language>
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      <value>Conductivity</value>
    </subject>
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  <doc>
    <id>57345</id>
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    <publishedYear>2023</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
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    <title language="eng">Suppressed Transition and Dynamic self-asembly of ionic superdiscs in cylindrical nanochannels</title>
    <abstract language="eng">Liquid crystalline mesophases in nanoconfinement exhibit intriguing phase transition behaviors and relaxation dynamics. Here, we investigate the molecular mobility and electrical conductivity of a columnar ionic liquid crystal confined in self-ordered nanoporous alumina oxide membranes of pore size ranging from 180 nm down to 25 nm. We use nano-broadband dielectric spectroscopy (BDS) and calorimetry to study the dynamics and phase behavior. Calorimetric investigation reveals a complete suppression of the columnar – isotropic transition, while the plastic crystalline – columnar transition temperature decreases with inverse pore size and deviates from the Gibbs – Thomson equation.&#13;
&#13;
For the bulk case, BDS detects two relaxation modes in the crystalline phase, the γ relaxation and the α1 relaxation, and two relaxation modes in the columnar phase, the α2 and α3 relaxation. All relaxation modes slow down for the confined case compared to the bulk. However, a new relaxation mode reflecting the interfacial layer emerges for the 80 and 25 nm. We discuss the possible molecular origins of the different relaxation modes observed. For the bulk ILC, a clear jump of 4 orders of magnitude in the absolute values of DC conductivity occurs at the transition from the plastic crystalline to hexagonal columnar phase, for the confined ILC, this transition is smooth. DC conductivity is reduced for the confined case, except for the 25nm, where the values are similar to the bulk.</abstract>
    <enrichment key="eventName">DPG Spring Meet 2023</enrichment>
    <enrichment key="eventPlace">Dresden, Germany</enrichment>
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    <author>Mohamed Aejaz Kolmangadi</author>
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      <value>Ionic Liquid crystals</value>
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    <subject>
      <language>eng</language>
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      <value>Nanoconfinement</value>
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      <language>eng</language>
      <type>uncontrolled</type>
      <value>Conductivity</value>
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  <doc>
    <id>57343</id>
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    <publishedYear>2023</publishedYear>
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    <language>eng</language>
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    <title language="eng">Molecular Dynamics of Janus Polynorbornenes: Glass Transitions and Nanophase separation</title>
    <abstract language="eng">We report the dielectric and calorimetric investigations of an homologous series of Janus polynorbornenes with rigid main backbone and flexible -Si(OR)3 side groups, of differing length alkyl chains (R = Propyl, Butyl, Hexyl, Octyl, Decyl). Dielectric dispersion reveals two active processes at low temperatures, denoted as β- and α- relaxation. The former can be assigned to localized fluctuations, whilst the latter relates to the glassy dynamics of the flexible -Si(OR)3 side groups, that creates a nanophase separation in both the alkyl chain rich and backbone rich domains. Temperature modulated DSC measurements and X-ray scattering experiment confirm the nanophase separation. Fast Scanning Calorimetry employing both fast heating and cooling rates detects the glass transition temperatures of the backbone rich domains, which are beyond or near to their degradation temperatures in terms of conventional DSC. The cooperative length scale of glass transition and the size of the alkyl chain rich domains increases with chain length. Alongside these results, a significant conductivity contribution was observed for all Poly(tricyclononenes) with Si(OR)3 side groups, which is interpreted in terms of a percolation model.</abstract>
    <enrichment key="eventName">Chemical Engg Seminar</enrichment>
    <enrichment key="eventPlace">Columbia University, NY, USA</enrichment>
    <enrichment key="eventStart">14.03.2023</enrichment>
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    <author>Mohamed Aejaz Kolmangadi</author>
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      <language>eng</language>
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      <value>Glass transition</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Conductivity</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fast Scanning Calorimetry</value>
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    <subject>
      <language>eng</language>
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      <value>Dynamics</value>
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    <collection role="institutes" number="">6 Materialchemie</collection>
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    <publishedYear>2023</publishedYear>
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    <publisherName>Zenodo</publisherName>
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    <title language="eng">X-ray scattering datasets associated with the publication "Molecular Mobility of Polynorbornenes with Trimethylsiloxysilyl side groups: Influence of the Polymerization Mechanism"</title>
    <abstract language="eng">X-ray scattering datasets for samples described in the 2022 publication "Molecular Mobility of Polynorbornenes with Trimethylsiloxysilyl side groups: Influence of the Polymerization Mechanism". This dataset includes both raw and processed X-ray scattering data for samples APTCN and MPTCN, alongside background measurements files (BKG).</abstract>
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    <author>Glen Jacob Smales</author>
    <author>Brian Richard Pauw</author>
    <author>Mohamed Aejaz Kolmangadi</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>X-ray scattering</value>
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      <language>eng</language>
      <type>uncontrolled</type>
      <value>SAXS</value>
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      <language>eng</language>
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      <value>MOUSE</value>
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      <language>eng</language>
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      <value>Membrane polymers</value>
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      <language>eng</language>
      <type>uncontrolled</type>
      <value>Microporous polymers</value>
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    <collection role="ddc" number="543">Analytische Chemie</collection>
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    <collection role="institutes" number="">6.5 Synthese und Streuverfahren nanostrukturierter Materialien</collection>
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    <title language="eng">X-ray scattering datasets associated with the publication "Side chain length dependent dynamics and conductivity in self assembled ion channels"</title>
    <abstract language="eng">X-ray scattering datasets for samples described in the 2022 publication "Side chain length dependent dynamics and conductivity in self assembled ion channels". This dataset includes both raw and processed X-ray scattering data for samples ILC8, ILC10, ILC12, ILC14 and ILC16 alongside background measurement files (BKG).</abstract>
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    <author>Glen Jacob Smales</author>
    <author>Brian Richard Pauw</author>
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      <value>MOUSE</value>
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      <language>eng</language>
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      <value>Columnar ionic liquid crystals</value>
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      <language>eng</language>
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      <value>Liquid crystals</value>
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    <title language="eng">X-ray scattering datasets associated with the publication "Molecular Dynamics of Janus Polynorbornenes: Glass Transitions and Nanophase Separation"</title>
    <abstract language="eng">X-ray scattering datasets for samples described in the 2020 publication "Molecular Dynamics of Janus Polynorbornenes: Glass Transitions and Nanophase Separation". This dataset includes both raw and processed X-ray scattering data for samples PTCHSiO-Pr, Bu, Hx, Oc and De, alongside background measurements files (BKG). This data was collected using the MOUSE project (instrument and methodology).</abstract>
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      <value>Alkyls</value>
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      <language>eng</language>
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