A5075152845- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Metal-Organic Frameworks: Synthesis and Applications
- Covalent Organic Framework Applications
- Crystallography and molecular interactions
- Plant biochemistry and biosynthesis
- Magnetism in coordination complexes
- Synthetic Organic Chemistry Methods
- Inorganic Fluorides and Related Compounds
- Marine Sponges and Natural Products
- Asymmetric Synthesis and Catalysis
- Nanoplatforms for cancer theranostics
- Porphyrin and Phthalocyanine Chemistry
- Oxidative Organic Chemistry Reactions
- Carbon dioxide utilization in catalysis
- Radical Photochemical Reactions
- Natural product bioactivities and synthesis
- Synthesis of Indole Derivatives
- Magnesium Oxide Properties and Applications
- Sesquiterpenes and Asteraceae Studies
- Organic and Inorganic Chemical Reactions
- Catalysis and Oxidation Reactions
- Enhanced Oil Recovery Techniques
- Gas Sensing Nanomaterials and Sensors
- Photodynamic Therapy Research Studies
University of Crete
2007-2024
Successful implementation of reticular chemistry using a judiciously designed rigid octatopic carboxylate organic linker allowed the construction expanded HKUST-1-like tbo-MOF series with intrinsic strong CH4 adsorption sites. The Cu-analogue displayed concomitant enhancement gravimetric and volumetric surface area highest reported uptake among tbo family, comparable to best performing metal frameworks (MOFs) for storage. corresponding (BET) areas 3971 m(2) g(-1) 2363 cm(-3) represent an...
The ability to direct the assembly of hexagonal building units offers great prospective construct awaited and looked-for hypothetical polybenzene (pbz) or "cubic graphite" structure, described 70 years ago. Here, we demonstrate successful use reticular chemistry as an appropriate strategy for design deliberate construction a zirconium-based metal-organic framework (MOF) with intricate pbz underlying net topology. judicious selection perquisite units, six connected organic inorganic blocks,...
Ligand modification in MOFs provides great opportunities not only for the development of functional materials with new or enhanced properties but also discovery novel structures. We report here that a sulfone-functionalized tetrahedral carboxylate-based ligand is capable directing formation and fascinating when combined Zr4+/Hf4+ rare-earth metal cations (RE) improved gas-sorption properties. In particular, resulting M-flu-SO2 (M: Zr, Hf) display type augmented flu-a net, which different as...
The chemistry of metal–organic frameworks (MOFs) continues to expand rapidly, providing materials with diverse structures and properties. reticular approach, where well-defined structural building blocks are combined together form crystalline open framework solids, has greatly accelerated the discovery new important materials. However, its full potential toward rational design MOFs relies on availability highly connected because these reduce number possible structures. Toward this,...
Guest responsive porous materials represent an important and fascinating class of multifunctional solids that have attracted considerable attention in recent years. An understanding how these structures form is essential toward their rational design, which a prerequisite for the development tailor-made advanced applications. We herein report novel series stable rare-earth (RE) MOFs show rare continuous breathing behavior unprecedented gas-trapping property. used asymmetric 4-c tetratopic...
We utilized the etb platform of MOFs for synthesis two new water-stable compounds based on amide functionalized trigonal tritopic organic linkers H3BTBTB (L1), H3BTCTB (L2) and Al3+ metal ions, namely, Al(L1) Al(L2). The mesoporous material exhibits an impressive methane (CH4) uptake at high pressures ambient temperature. corresponding values 192 cm3 (STP) cm-3, 0.254 g g-1 100 bar, 298 K are among highest reported MOFs, while gravimetric volumetric working capacities (between 80 bar 5 bar)...
In recent years, the design and discovery of new metal-organic framework (MOF) platforms with distinct structural features tunable chemical composition has remarkably enhanced by applying reticular chemistry rules molecular building block (MBB) approach. We targeted synthesis rare earth (RE)-MOF based on a rectangular-shaped 4-c linker, acting as rigid organic MBB. Accordingly, we designed synthesized ligand 1,2,4,5-tetrakis(4-carboxyphenyl)-3,6-dimethyl-benzene (H4L), in which two methyl...
Highly connected metal organic frameworks (MOFs) in which at least one building block has connectivity higher than twelve are very rare and much desirable. We report here the first examples of isostructural 14-connected MOFs, RE-frt-MOF-1, constructed from assembly 14-c hexanuclear rare-earth clusters, [RE6(μ3-X)8(COO)12]2- (RE: Y3+, Tb3+, Dy3+, Ho3+, Er3+, Yb3+ X: OH-/F-) with a tritopic carboxylate-based linker. This linker serves as 3-c 4-c node resulting formation unique, trinodal...
Epoxy terpenes cyclize readily, by confinement within zeolite NaY, to form exomethylenic cyclohexanols as the major products. The selective monocyclization of 10,11-epoxyfarnesyl acetate NaY provides a short and efficient biomimetic route (±)-elengasidiol (±)-farnesiferols B−D.
Abstract A variety of epoxy polyene terpenes cyclize readily by confinement within zeolite NaY to form primarily products monocyclization. The monocyclization pathway is highly predominant, irrespectively the side chain terpene, while monocyclic possess regioselectively an exomethylenic double bond. selective in case epoxyfarnesyl acetate, epoxyfarnesylacetone or 2,3‐epoxysqualene, provides a direct route synthesis natural products, such as elengasidiol, farnesiferols B–D, achilleol A,...
[reaction: see text] The ene reaction of singlet oxygen with chiral trisubstituted alkenes bearing an alkyl and a phenyl group at the stereogenic center is erythro diastereoselective in solution threo if carried out within zeolite Na-Y. change diastereoselection trend by confinement attributed to synergism steric effects cation-pi interactions.
Abstract Zeolite NaY promotes efficiently the biomimetic cyclization of small acyclic terpenes. Geranyl and neryl acetone undergo a novel tandem 1,5‐diene cyclization/carbonyl‐ene reaction to form natural product α‐ambrinol isolated in >65% yield.
Based on stereoisotopic studies and beta-secondary isotope effects, we propose that the acid-catalyzed cyclization of geranyl acetate proceeds through a concerted mechanism. Under heterogeneous conditions (zeolite Y confinement), preorganized chairlike transition state predominates, whereas under homogeneous boat- states are almost isoenergetic. For case farnesyl acetate, dicyclization occurs with boat-chair competing chair-chair state. zeolite confinement conditions, chair-chairlike is...
Abstract An exciting direction in metal‐organic frameworks involves the design and synthesis of flexible structures which can reversibly adapt their structure when triggered by external stimuli. Controlling extent nature response such solids is critical order to develop custom dynamic materials for advanced applications. Towards this, it highly important expand diversity existing MOFs, generating novel gain an in‐depth understanding associated phenomena, eventually unlocking key...
A high surface area layered MOF with<bold>kgd-a</bold>topology, based on a nanosized and highly aromatic hexagonal linker, shows H<sub>2</sub>and CO<sub>2</sub>uptake.
Abstract The stereochemistry in the acid‐catalysed biomimetic cyclization of [8,8,8‐D 3 ]geranyl acetate was examined solution and under conditions zeolite Y confinement. In intrazeolite reaction gem ‐allylic methyl group adopts a diastereoselective disposition product (64 % dr ). contrast, ‐dimethyl homogeneous medium (ClSO H/2‐nitropropane) proceeds with negligible diastereoselectivity ( < 5 %). enhanced diastereoselection within is attributed to proximity nucleophilic double bond...
The sesquiterpene nanaimoal was synthesized in 21% overall yield and a biomimetic manner. As key step, the acid-catalyzed cyclization of farnesal under zeolite NaY confinement conditions used. intrazeolite affords as major product double-bond isomer nanaimoal, via novel diastereoselective tandem 1,5-diene cyclization/Prins-type reaction.