Marcin Stępień
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View article: Three Conformations, Four Stimuli: Balancing Bond Order and Aromaticity in a Dual‐BN Dihydrophenazine Switch
Three Conformations, Four Stimuli: Balancing Bond Order and Aromaticity in a Dual‐BN Dihydrophenazine Switch Open
Designing π systems that respond to several stimuli or switch among multiple conformations remains challenging. A diborylated dihydrophenazine, in which aromaticity changes are coupled to internal B─N rotations, operates as a multistate op…
View article: 43,44,47,48‐Tetrathiaoctaphyrin(2.1.1.1.2.1.1.1) and its Organometallic bis‐Rh <sup>III</sup> Complex: Coordination‐Driven Switching of Conformation and Aromaticity
43,44,47,48‐Tetrathiaoctaphyrin(2.1.1.1.2.1.1.1) and its Organometallic bis‐Rh <sup>III</sup> Complex: Coordination‐Driven Switching of Conformation and Aromaticity Open
43,44,47,48‐Tetrathiaoctaphyrin (2.1.1.1.2.1.1.1), obtained in a concise synthesis, is found to adopt a C 2 ‐symmetric figure‐eight conformation in solution and in the solid state. The macrocycle is globally nonaromatic but exhibits strong…
View article: Heptannulated Perylene Diimides: Formation and Reactivity of Electron‐Deficient Tropylium Cations and Heptafulvenes
Heptannulated Perylene Diimides: Formation and Reactivity of Electron‐Deficient Tropylium Cations and Heptafulvenes Open
The development of new π‐conjugated motifs opens pathways to previously unexplored classes of organic semiconductors and functional dyes. In this study, five‐ and seven‐membered carbocycles were fused at the ortho and bay regions of electr…
View article: Heptannulated Perylene Diimides: Formation and Reactivity of Electron‐Deficient Tropylium Cations and Heptafulvenes
Heptannulated Perylene Diimides: Formation and Reactivity of Electron‐Deficient Tropylium Cations and Heptafulvenes Open
The development of new π‐conjugated motifs opens pathways to previously unexplored classes of organic semiconductors and functional dyes. In this study, five‐ and seven‐membered carbocycles were fused at the ortho and bay regions of electr…
View article: Triindenotriphenylenes: Spin‐Frustrated Triskelion Triradicals with Excellent Ambient Stability
Triindenotriphenylenes: Spin‐Frustrated Triskelion Triradicals with Excellent Ambient Stability Open
A triskelion‐shaped triradical triindeno[1,2‐ a :1′,2′‐ g : 1′′,2′′‐ m ]triphenylen‐7‐yl ( 1 ) and its internally fused derivative ( 2 ) obtained by oxidative cyclization were prepared in a straightforward synthetic sequence. Both compound…
View article: Triindenotriphenylenes: Spin‐Frustrated Triskelion Triradicals with Excellent Ambient Stability
Triindenotriphenylenes: Spin‐Frustrated Triskelion Triradicals with Excellent Ambient Stability Open
A triskelion‐shaped triradical triindeno[1,2‐ a :1′,2′‐ g : 1′′,2′′‐ m ]triphenylen‐7‐yl ( 1 ) and its internally fused derivative ( 2 ) obtained by oxidative cyclization were prepared in a straightforward synthetic sequence. Both compound…
View article: CCDC 2220409: Experimental Crystal Structure Determination
CCDC 2220409: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2220408: Experimental Crystal Structure Determination
CCDC 2220408: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2220407: Experimental Crystal Structure Determination
CCDC 2220407: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Difluorenoheteroles: topological control of π conjugation in diradicaloids and mixed-valence radical ions
Difluorenoheteroles: topological control of π conjugation in diradicaloids and mixed-valence radical ions Open
Linking and fusion of triphenylmethyl radicals produces isomeric difluorenoheterole diradicaloids, with heteroatom-dependent paths for spin–spin interactions.
View article: Pentacosacyclenes: cruciform molecular nanocarbons based on cyclooctatetraene
Pentacosacyclenes: cruciform molecular nanocarbons based on cyclooctatetraene Open
In pentacosacyclenes, a saddle-shaped cyclooctatetraene ring (orange) undergoes acenaphthylene fusion (green) and rylene extension (yellow). Their properties are further tuned by peripheral decoration with alkyl groups (red) or imide rings…
View article: CCDC 2209268: Experimental Crystal Structure Determination
CCDC 2209268: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2209267: Experimental Crystal Structure Determination
CCDC 2209267: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2209269: Experimental Crystal Structure Determination
CCDC 2209269: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2250914: Experimental Crystal Structure Determination
CCDC 2250914: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2257884: Experimental Crystal Structure Determination
CCDC 2257884: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2257885: Experimental Crystal Structure Determination
CCDC 2257885: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2257886: Experimental Crystal Structure Determination
CCDC 2257886: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Dinor[7]helicene and Beyond: Divergent Synthesis of Chiral Diradicaloids with Variable Open‐Shell Character
Dinor[7]helicene and Beyond: Divergent Synthesis of Chiral Diradicaloids with Variable Open‐Shell Character Open
Diradicaloid helicenes constructed formally by non‐benzenoid double π‐extension of phenanthrene were synthesized by a common strategy involving double electrophilic benzannulation. Steric effects in the second benzannulation step led to co…
View article: Dinor[7]helicene and Beyond: Divergent Synthesis of Chiral Diradicaloids with Variable Open‐Shell Character
Dinor[7]helicene and Beyond: Divergent Synthesis of Chiral Diradicaloids with Variable Open‐Shell Character Open
Diradicaloid helicenes constructed formally by non‐benzenoid double π‐extension of phenanthrene were synthesized by a common strategy involving double electrophilic benzannulation. Steric effects in the second benzannulation step led to co…
View article: Tetrafluorenofulvalene as a Sterically Frustrated Open-Shell Alkene
Tetrafluorenofulvalene as a Sterically Frustrated Open-Shell Alkene Open
Cartesian coordinates of calculated structures Source data for Fig. 4 and Supplementary Fig. 12, 16–18, and 21
View article: Tetrafluorenofulvalene as a Sterically Frustrated Open-Shell Alkene
Tetrafluorenofulvalene as a Sterically Frustrated Open-Shell Alkene Open
Cartesian coordinates of calculated structures Source data for Fig. 4 and Supplementary Fig. 12, 16–18, and 21
View article: Tetrafluorenofulvalene: A Sterically Frustrated Open-Shell Alkene
Tetrafluorenofulvalene: A Sterically Frustrated Open-Shell Alkene Open
A typical π bond is weakened by oxidation and reduction, corresponding respectively to the removal of electrons from bonding orbitals and addition of electrons to antibonding orbitals, and by unpairing of the bonding electrons, e.g. in the…
View article: Geochemistry of germanium in thermal waters of the Jelenia Góra geothermal system (Sudetes, Poland): solute relationships and aquifer mineralogy
Geochemistry of germanium in thermal waters of the Jelenia Góra geothermal system (Sudetes, Poland): solute relationships and aquifer mineralogy Open
A long-term (2004–2021) study of the chemical composition of thermal waters in the Jelenia Góra geothermal system provided information on a wide set of components. The subject of the present study is the geochemistry of germanium (Ge), whi…
View article: Tridecacyclene Tetraimide: An Easily Reduced Cyclooctatetraene Derivative
Tridecacyclene Tetraimide: An Easily Reduced Cyclooctatetraene Derivative Open
Tridecacyclene tetraimide, TCTI , an electron‐deficient non‐benzenoid nanocarbon with a C 56 N 4 polycyclic framework was obtained in a concise synthesis. TCTI has a non‐planar structure and forms π‐stacked dimers in the solid state. In so…
View article: Tridecacyclene Tetraimide: An Easily Reduced Cyclooctatetraene Derivative
Tridecacyclene Tetraimide: An Easily Reduced Cyclooctatetraene Derivative Open
Tridecacyclene tetraimide, TCTI , an electron‐deficient non‐benzenoid nanocarbon with a C 56 N 4 polycyclic framework was obtained in a concise synthesis. TCTI has a non‐planar structure and forms π‐stacked dimers in the solid state. In so…
View article: Simultaneous Detection of Circularly Polarized Luminescence and Raman Optical Activity in an Organic Molecular Lemniscate
Simultaneous Detection of Circularly Polarized Luminescence and Raman Optical Activity in an Organic Molecular Lemniscate Open
Circularly polarized luminescence (CPL) and Raman optical activity (ROA) were observed in a single spectroscopic experiment for a purely organic molecule, an event that had so far been limited to lanthanide‐based complexes. The present obs…
View article: Simultaneous Detection of Circularly Polarized Luminescence and Raman Optical Activity in an Organic Molecular Lemniscate
Simultaneous Detection of Circularly Polarized Luminescence and Raman Optical Activity in an Organic Molecular Lemniscate Open
Circularly polarized luminescence (CPL) and Raman optical activity (ROA) were observed in a single spectroscopic experiment for a purely organic molecule, an event that had so far been limited to lanthanide‐based complexes. The present obs…
View article: CCDC 2019726: Experimental Crystal Structure Determination
CCDC 2019726: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …