@article{SeuffertWintzheimerOppmannetal.2020,
  author    = {Seuffert, Marcel T. and Wintzheimer, Susanne and Oppmann, Maximilian and Granath, Tim and Prieschl, Johannes and Alrefai, Anas and Holdt, Hans-J{\"u}rgen and M{\"u}ller-Buschbaum, Klaus and Mandel, Karl},
  title     = {An all white magnet by combination of electronic properties of a white light emitting MOF with strong magnetic particle systems},
  series = {Journal of materials chemistry : C, Materials for optical and electronic devices},
  volume    = {8},
  journal   = {Journal of materials chemistry : C, Materials for optical and electronic devices},
  number    = {45},
  publisher = {Royal Society of Chemistry},
  address   = {Cambridge},
  issn      = {2050-7526},
  doi       = {10.1039/d0tc03473h},
  pages     = {16010 -- 16017},
  year      = {2020},
  abstract  = {A multi-component particle system was developed that combines the properties of white color, white light emission and strong magnetism on the macroscopic and microscopic scale. The system is constituted by combination of an inorganic white core with either hard or soft magnetic properties and a white light emitting MOF. The key towards this achievement is the supraparticulate character constituted by a magnetic core, of either magnetite or alpha-Fe, surrounded by titania and silica nanoparticles of a certain size in a loose structural shell-arrangement as white components and finally the white light emitting metal-organic framework (MOF) EuTb@IFP-1 as building blocks of a core-shell structure. The supraparticles are created by forced assembly of the inorganic compounds and by combining spray-drying and postsynthetic modification by solvothermal chemistry. Thereby, the gap is bridged that homogenous compounds are either strongly magnetic, white in appearance or white light emitting. The composites presented herein inherit these properties intrinsically as electronic properties. The white characteristics are based on all optical properties that enable white: light reflection, refraction, and light emission. This work shifts the paradigm that strong magnetic materials are always expected to be intrinsically dark.},
  language  = {en}
}
@article{MondalBhuniaAttallahetal.2016,
  author    = {Mondal, Suvendu Sekhar and Bhunia, Asamanjoy and Attallah, Ahmed G. and Matthes, Philipp R. and Kelling, Alexandra and Schilde, Uwe and M{\"u}ller-Buschbaum, Klaus and Krause-Rehberg, Reinhard and Janiak, Christoph and Holdt, Hans-J{\"u}rgen},
  title     = {Study of the Discrepancies between Crystallographic Porosity and Guest Access into Cadmium-Imidazolate Frameworks and Tunable Luminescence Properties by Incorporation of Lanthanides},
  series = {Chemistry - a European journal},
  volume    = {22},
  journal   = {Chemistry - a European journal},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {0947-6539},
  doi       = {10.1002/chem.201504757},
  pages     = {6905 -- 6913},
  year      = {2016},
  abstract  = {An extended member of the isoreticular family of metal-imidazolate framework structures, IFP-6 (IFP=imidazolate framework Potsdam), based on cadmium metal and an in situ functionalized 2-methylimidazolate-4-amide-5-imidate linker is reported. A porous 3D framework with 1D hexagonal channels with accessible pore windows of 0.52nm has been synthesized by using an ionic liquid (IL) linker precursor. IFP-6 shows significant gas uptake capacity only for CO2 and CH4 at elevated pressure, whereas it does not adsorb N-2, H-2, and CH4 under atmospheric conditions. IFP-6 is assumed to deteriorate at the outside of the material during the activation process. This closing of the metal-organic framework (MOF) pores is proven by positron annihilation lifetime spectroscopy (PALS), which revealed inherent crystal defects. PALS results support the conservation of the inner pores of IFP-6. IFP-6 has also been successfully loaded with luminescent trivalent lanthanide ions (Ln(III)=Tb, Eu, and Sm) in a bottom-up one-pot reaction through the in situ generation of the linker ligand and in situ incorporation of photoluminescent Ln ions into the constituting network. The results of photoluminescence investigations and powder XRD provide evidence that the Ln ions are not doped as connectivity centers into the frameworks, but are instead located within the pores of the MOFs. Under UV light irradiation, Tb@IFP-6 and Eu@IFP-6 ((exc)=365nm) exhibit observable emission changes to a greenish and reddish color, respectively, as a result of strong Ln 4f emissions.},
  language  = {en}
}
@article{MondalBehrensMatthesetal.2015,
  author    = {Mondal, Suvendu Sekhar and Behrens, Karsten and Matthes, Philipp R. and Sch{\"o}nfeld, Fabian and Nitsch, J{\"o}rn and Steffen, Andreas and Primus, Philipp-Alexander and Kumke, Michael Uwe and M{\"u}ller-Buschbaum, Klaus and Holdt, Hans-J{\"u}rgen},
  title     = {White light emission of IFP-1 by in situ co-doping of the MOF pore system with Eu3+ and Tb3+},
  series = {Journal of materials chemistry : C, Materials for optical and electronic devices},
  volume    = {3},
  journal   = {Journal of materials chemistry : C, Materials for optical and electronic devices},
  number    = {18},
  publisher = {Royal Society of Chemistry},
  address   = {Cambridge},
  issn      = {2050-7526},
  doi       = {10.1039/c4tc02919d},
  pages     = {4623 -- 4631},
  year      = {2015},
  language  = {en}
}
@article{MondalBehrensMatthesetal.2015,
  author    = {Mondal, Suvendu Sekhar and Behrens, Karsten and Matthes, Philipp R. and Sch{\"o}nfeld, Fabian and Nitsch, J{\"o}rn and Steffen, Andreas and Primus, Philipp-Alexander and Kumke, Michael Uwe and M{\"u}ller-Buschbaum, Klaus and Holdt, Hans-J{\"u}rgen},
  title     = {White light emission of IFP-1 by in situ co-doping of the MOF pore system with Eu3+ and Tb3+},
  series = {Journal of materials chemistry : C, Materials for optical and electronic devices},
  volume    = {18},
  journal   = {Journal of materials chemistry : C, Materials for optical and electronic devices},
  number    = {3},
  publisher = {Royal Society of Chemistry},
  address   = {Cambridge},
  issn      = {2050-7534},
  doi       = {10.1039/C4TC02919D},
  pages     = {4623 -- 4631},
  year      = {2015},
  abstract  = {Co-doping of the MOF 3∞[Zn(2-methylimidazolate-4-amide-5-imidate)] (IFP-1 = Imidazolate Framework Potsdam-1) with luminescent Eu3+ and Tb3+ ions presents an approach to utilize the porosity of the MOF for the intercalation of luminescence centers and for tuning of the chromaticity to the emission of white light of the quality of a three color emitter. Organic based fluorescence processes of the MOF backbone as well as metal based luminescence of the dopants are combined to one homogenous single source emitter while retaining the MOF's porosity. The lanthanide ions Eu3+ and Tb3+ were doped in situ into IFP-1 upon formation of the MOF by intercalation into the micropores of the growing framework without a structure directing effect. Furthermore, the color point is temperature sensitive, so that a cold white light with a higher blue content is observed at 77 K and a warmer white light at room temperature (RT) due to the reduction of the organic emission at higher temperatures. The study further illustrates the dependence of the amount of luminescent ions on porosity and sorption properties of the MOF and proves the intercalation of luminescence centers into the pore system by low-temperature site selective photoluminescence spectroscopy, SEM and EDX. It also covers an investigation of the border of homogenous uptake within the MOF pores and the formation of secondary phases of lanthanide formates on the surface of the MOF. Crossing the border from a homogenous co-doping to a two-phase composite system can be beneficially used to adjust the character and warmth of the white light. This study also describes two-color emitters of the formula Ln@IFP-1a-d (Ln: Eu, Tb) by doping with just one lanthanide Eu3+ or Tb3+.},
  language  = {en}
}