Functional and stimuli-responsive materials
We design and synthesize novel (mainly coordination) compounds and materials and study their properties such as:
- (proton) conductivity,
- magnetic properties,
- redox-activity,
- chemical stability (e.g. pH), etc.
Recent publications:
a) Proton conductivity
Bunzen H., Javed A., Klawinski D., Lamp A., Grzywa M., Kalytta-Mewes A., Tiemann M., Krug von Nidda H.-A., Wagner T., Volkmer D.: Anisotropic Water-Mediated Proton Conductivity in Large Iron(II) Metal-Organic Framework Single Crystals for Proton-Exchange Membrane Fuel Cells, ACS Appl. Nano Mater. 2019, 2, 291-298.
Javed A., Steinke F., Wöhlbrandt S., Bunzen H., Stock N., Tiemann M.: The role of sulfonate groups and hydrogen bonding in the proton conductivity of two coordination networks, Beilstein J. Nanotechnol. 2022, 13, 437-443.
Javed A., Strauss I., Bunzen H., Caro J., Tiemann M.: Humidity-Mediated Anisotropic Proton Conductivity through the 1D Channels of Co-MOF-74, Nanomaterials 2020, 10, 1263.
b) Synthesis of coordination materials
Röß-Ohlenroth R., Freudig C., Kraft M., Bunzen H., Volkmer D.: Assembly of Porous Metal Hydrogen-Bonded Organic Frameworks from Diamine-Functionalized Kuratowski Complexes, Cryst. Growth Des. 2022, 22, 379-391.
Bunzen H., Grzywa M., Aljohani R., Krug von Nidda H.-A., Volkmer D.: Synthesis, thermal stability and magnetic properties of a Mn(II) coordination framework containing bistriazolate ligands, Eur. J. Inorg. Chem. 2019, 41, 4471-4476.
Bunzen H., Mahmood F., Grzywa M., Volkmer D.: Zinc(II) Coordination Frameworks Based on Benzobisimidazole: The Role of the Methyl Substituent, Eur. J. Inorg. Chem. 2017, 5395-5402.
Bunzen H., Lamp A., Grzywa M., Barkschat C.,Volkmer D.: Bistriazole-p-benzoquinone and its alkali salts: electrochemical behaviour in aqueous alkaline solutions, Dalton Trans. 2017, 46, 12537-12543.
Bunzen H., Grzywa M., Kalytta-Mewes A., Volkmer D.: One-pot synthesis of utrastable pentanuclear alkylzinc complexes, Dalton Trans. 2017, 146, 2618-2625.