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Items from 1 to 20 out of 734 results

article

Crystalline Porous Organic Cage Membranes Constructed Using Fortified Intermolecular Interactions for Molecular Sieving

Ziye Song, Linghao Liu, Qian Sun, Jingcheng Du, more

Angewandte Chemie > 136 > 38 > n/a - n/a

Among the various types of materials with intrinsic porosity, porous organic cages (POCs) are distinctive as discrete molecules that possess intrinsic cavities and extrinsic channels capable of facilitating molecular sieving. However, the fabrication of POC membranes remains highly challenging due to the weak noncovalent intermolecular interactions and most reported POCs are powders. In this study,...

article

Crystalline Porous Organic Cage Membranes Constructed Using Fortified Intermolecular Interactions for Molecular Sieving

Ziye Song, Linghao Liu, Qian Sun, Jingcheng Du, more

Angewandte Chemie International Edition > 63 > 38 > n/a - n/a

article

Molecular Packing Topology and Interactions to Decipher Mechanical Compliances in Dicyano‐Distyrylbenzene Derivatives

Madhubrata Ghora, Ranjit Kumar Manna, Sang Kyu Park, Sangyoon Oh, more

Chemistry – A European Journal > 30 > 45 > n/a - n/a

Flexible optoelectronics is the need of the hour as the market moves toward wearable and conformable devices. Crystalline π‐conjugated materials offer high performance as active materials compared to their amorphous counterpart, but they are typically brittle. This poses a significant challenge that needs to be overcome to unfold their potential in optoelectronic devices. Unveiling the molecular packing...

article

Precisely Regulating Intermolecular Interactions and Molecular Packing of Nonfused‐Ring Electron Acceptors via Halogen Transposition for High‐Performance Organic Solar Cells

Xiaobin Gu, Rui Zeng, Yuqi Hou, Na Yu, more

Angewandte Chemie International Edition > 63 > 34 > n/a - n/a

The structure of molecular aggregates is crucial for charge transport and photovoltaic performance in organic solar cells (OSCs). Herein, the intermolecular interactions and aggregated structures of nonfused‐ring electron acceptors (NFREAs) are precisely regulated through a halogen transposition strategy, resulting in a noteworthy transformation from a 2D‐layered structure to a 3D‐interconnected packing...

article

Precisely Regulating Intermolecular Interactions and Molecular Packing of Nonfused‐Ring Electron Acceptors via Halogen Transposition for High‐Performance Organic Solar Cells

Xiaobin Gu, Rui Zeng, Yuqi Hou, Na Yu, more

Angewandte Chemie > 136 > 34 > n/a - n/a

article

A comparative study of the effect of high‐pressure and low temperature on the crystal structure of lithium xanthinate hydrate

Anna Gaydamaka, Nikita Bogdanov, Boris Zakharov, Sergey Goryainov, more

Acta Crystallographica Section B > 80 > 4 > 311 - 325

The crystal structure of lithium xanthinate hydrate was studied by single crystal X‐ray diffraction and Raman spectroscopy on cooling to 100 K and under compression to 5.3 GPa. A phase transition at ∼4 GPa is observed. No phase transitions occur on cooling. Anisotropy of lattice strain and changes in intermolecular interactions are compared.

article

Intermolecular Interaction Mediated Potassium Ion Intercalation Chemistry in Ether‐Based Electrolyte for Potassium‐Ion Batteries

Hongliang Xie, Honghong Liang, Pushpendra Kumar, Haoran Cheng, more

Advanced Functional Materials > 34 > 28 > n/a - n/a

Electrolyte design is indeed a highly effective strategy to improve battery performance. However, identifying the intermolecular interaction in electrolyte solvation structure is rarely reported in potassium‐ion batteries. Herein, it is discovered that a solvent‐solvent intermolecular interaction can be formed when introducing the cyclopentylmethyl ether (CPME) solvent into the commonly used 1,2‐dimethoxyethane...

article

Guest Acceptors with Lower Electrostatic Potential in Ternary Organic Solar Cells for Minimizing Voltage Losses

Shuncheng Yang, Zhenyu Chen, Jintao Zhu, Daobin Yang, more

Advanced Materials > 36 > 26 > n/a - n/a

The ternary strategy, in which one guest component is introduced into one host binary system, is considered to be one of the most effective ways to realize high‐efficiency organic solar cells (OSCs). To date, there is no efficient method to predict the effectiveness of guest components in ternary OSCs. Herein, three guest compositions (i.e., ANF‐1, ANF‐2 and ANF‐3) with different electrostatic potential...

article

Over 19 % Efficiency Organic Solar Cells Enabled by Manipulating the Intermolecular Interactions through Side Chain Fluorine Functionalization

Huawei Hu, Shuai Liu, Jiaoyu Xu, Ruijie Ma, more

Angewandte Chemie > 136 > 15 > n/a - n/a

Fluorine side chain functionalization of non‐fullerene acceptors (NFAs) represents an effective strategy for enhancing the performance of organic solar cells (OSCs). However, a knowledge gap persists regarding the relationship between structural changes induced by fluorine functionalization and the resultant impact on device performance. In this work, varying amounts of fluorine atoms were introduced...

article

Diboraperylene Diborinic Acid Self‐Assembly on Ag(111)—Kagome Flat Band Localized States Imaged by Scanning Tunneling Microscopy and Spectroscopy

Wun‐Chang Pan, Carina Mützel, Soumyajyoti Haldar, Hendrik Hohmann, more

Angewandte Chemie > 136 > 15 > n/a - n/a

Replacement of sp²‐hybridized carbon in polycyclic aromatic hydrocarbons (PAHs) by boron affords electron‐deficient π‐scaffolds due to the vacant p_z‐orbital of three‐coordinate boron with the potential for pronounced electronic interactions with electron‐rich metal surfaces. Using a diboraperylene diborinic acid derivative as precursor and a controlled on‐surface non‐covalent synthesis approach, we...

article

Over 19 % Efficiency Organic Solar Cells Enabled by Manipulating the Intermolecular Interactions through Side Chain Fluorine Functionalization

Huawei Hu, Shuai Liu, Jiaoyu Xu, Ruijie Ma, more

Angewandte Chemie International Edition > 63 > 15 > n/a - n/a

article

Diboraperylene Diborinic Acid Self‐Assembly on Ag(111)—Kagome Flat Band Localized States Imaged by Scanning Tunneling Microscopy and Spectroscopy

Wun‐Chang Pan, Carina Mützel, Soumyajyoti Haldar, Hendrik Hohmann, more

Angewandte Chemie International Edition > 63 > 15 > n/a - n/a

article

Central Core Substitutions and Film‐Formation Process Optimization Enable Approaching 19% Efficiency All‐Polymer Solar Cells

Dingding Qiu, Hao Zhang, Chenyang Tian, Jianqi Zhang, more

Advanced Materials > 35 > 51 > n/a - n/a

Molecular interactions and film‐formation processes greatly impact the blend film morphology and device performances of all‐polymer solar cells (all‐PSCs). Molecular structure, such as the central cores of polymer acceptors, would significantly influence this process. Herein, the central core substitutions of polymer acceptors are adjusted and three quinoxaline (Qx)‐fused‐core‐based materials, PQx1,...

article

A high‐pressure single‐crystal X‐ray diffraction study of potassium guaninate hydrate, K⁺·C₅H₄N₅O⁻·H₂O

Anna A. Gaydamaka, Sergey V. Rashchenko, Anna I. Semerikova, Ekaterina S. Smirnova, more

Acta Crystallographica Section B > 79 > 6 > 495 - 509

The crystal structure of potassium guaninate hydrate, K⁺·C₅H₄N₅O⁻·H₂O, was studied in the pressure range of 1 atm to 7.3 GPa by single‐crystal diffraction using synchrotron radiation and a laboratory X‐ray diffraction source. Structural strain was compared to that of the same salt hydrate on cooling, and in 2Na⁺·C₅H₃N₅O²⁻·7H₂O under hydrostatic compression and on cooling. A polymorphic transition...

article

Enabling Record‐high Deep‐Red/Near‐Infrared Electroluminescence Through Subtly Managing Intermolecular Interactions of a Thermally Activated Delayed Fluorescence Emitter

Hui Wang, Kai Wang, Jia‐Xiong Chen, Xi Zhang, more

Advanced Functional Materials > 33 > 41 > n/a - n/a

Deep‐red/near‐infrared (DR/NIR) organic light‐emitting diodes (OLEDs) are promising for applications such as night‐vision readable marking, bioimaging, and photodynamic therapy. To tune emission spectra into the DR/NIR region, red emitters generally require assistance from intermolecular interactions. But such interactions generally lead to sharp efficiency declines resulting from unwanted quenching...

article

Structural insight into the cooperativity of spin crossover compounds

H. Shahed, N. Sharma, M. Angst, J. Voigt, more

Acta Crystallographica Section B > 79 > 5 > 354 - 367

Spin‐crossover (SCO) compounds are promising materials for a wide variety of industrial applications. However, the fundamental understanding of their nature of transition and its effect on the physical properties are still being fervently explored; the microscopic knowledge of their transition is essential for tailoring their properties. Here an attempt is made to correlate the changes in macroscopic...

article

Tailoring the Weight of Surface and Intralayer Edge States to Control LUMO Energies

Sarah Jasmin Finkelmeyer, Erik J. Askins, Jonas Eichhorn, Soumik Ghosh, more

Advanced Materials > 35 > 40 > n/a - n/a

The energies of the frontier molecular orbitals determine the optoelectronic properties in organic films, which are crucial for their application, and strongly depend on the morphology and supramolecular structure. The impact of the latter two properties on the electronic energy levels relies primarily on nearest‐neighbor interactions, which are difficult to study due to their nanoscale nature and...

article

Cover Feature: CH₃CN@open‐C₆₀: An Effective Inner‐Space Modification and Isotope Effect Inside a Nano‐Sized Flask (Chem. Eur. J. 47/2023)

Guanglin Huang, Yuki Ide, Yoshifumi Hashikawa, Takashi Hirose, more

Chemistry – A European Journal > 29 > 47 > n/a - n/a

A polar CH₃CN molecule has been encapsulated inside an open‐cage C₆₀ derivative under high pressure. The inserted CH₃CN molecule has an impressive effect on the outer carbon cage, as shown by the enhanced polarity and decreased LUMO level. Crystallographic and computational analyses revealed that these changes were governed by the existence of the CH₃CN and cage deformation caused by the insertion...

article

CH₃CN@open‐C₆₀: An Effective Inner‐Space Modification and Isotope Effect Inside a Nano‐Sized Flask

Guanglin Huang, Yuki Ide, Yoshifumi Hashikawa, Takashi Hirose, more

Chemistry – A European Journal > 29 > 47 > n/a - n/a

Despite several small molecules being encapsulated inside cage‐opened fullerene derivatives, such species have not considerably affected the structures and properties of the outer carbon cages. Herein, we achieved an effective inner‐space modification for an open‐cage C₆₀ derivative by insertion of a neutral CH₃CN molecule into the cavity. The CH₃CN@open‐C₆₀ thus obtained showed an enhanced polarity,...

article

Spin‐Crossover Iron(II) Compounds with Pendent Tetraphenylethylene Group

Shi‐Hang Shi, Jie‐Sheng Hu, Jun Tao

European Journal of Inorganic Chemistry > 26 > 20 > n/a - n/a

Two iron(II) compounds with the general formula of [Fe(phen‐TPE)₂(NCX)₂] ⋅ Y (phen‐TPE=3‐(tetraphenylethylene)‐1,10‐phenanthroline; X=S and Y=2DMF for 1 ⋅ 2DMF; X=Se and Y=DMF for 2 ⋅ DMF) were synthesized and characterized by single‐crystal X‐ray crystallography and magnetic measurements. Both compounds exhibited thermal‐induced complete one‐step spin‐crossover (SCO) behavior with the critical transition...

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Crystalline Porous Organic Cage Membranes Constructed Using Fortified Intermolecular Interactions for Molecular Sieving

Crystalline Porous Organic Cage Membranes Constructed Using Fortified Intermolecular Interactions for Molecular Sieving

Molecular Packing Topology and Interactions to Decipher Mechanical Compliances in Dicyano‐Distyrylbenzene Derivatives

Precisely Regulating Intermolecular Interactions and Molecular Packing of Nonfused‐Ring Electron Acceptors via Halogen Transposition for High‐Performance Organic Solar Cells

Precisely Regulating Intermolecular Interactions and Molecular Packing of Nonfused‐Ring Electron Acceptors via Halogen Transposition for High‐Performance Organic Solar Cells

A comparative study of the effect of high‐pressure and low temperature on the crystal structure of lithium xanthinate hydrate

Intermolecular Interaction Mediated Potassium Ion Intercalation Chemistry in Ether‐Based Electrolyte for Potassium‐Ion Batteries

Guest Acceptors with Lower Electrostatic Potential in Ternary Organic Solar Cells for Minimizing Voltage Losses

Over 19 % Efficiency Organic Solar Cells Enabled by Manipulating the Intermolecular Interactions through Side Chain Fluorine Functionalization

Diboraperylene Diborinic Acid Self‐Assembly on Ag(111)—Kagome Flat Band Localized States Imaged by Scanning Tunneling Microscopy and Spectroscopy

Over 19 % Efficiency Organic Solar Cells Enabled by Manipulating the Intermolecular Interactions through Side Chain Fluorine Functionalization

Diboraperylene Diborinic Acid Self‐Assembly on Ag(111)—Kagome Flat Band Localized States Imaged by Scanning Tunneling Microscopy and Spectroscopy

Central Core Substitutions and Film‐Formation Process Optimization Enable Approaching 19% Efficiency All‐Polymer Solar Cells

A high‐pressure single‐crystal X‐ray diffraction study of potassium guaninate hydrate, K⁺·C₅H₄N₅O⁻·H₂O

Enabling Record‐high Deep‐Red/Near‐Infrared Electroluminescence Through Subtly Managing Intermolecular Interactions of a Thermally Activated Delayed Fluorescence Emitter

Structural insight into the cooperativity of spin crossover compounds

Tailoring the Weight of Surface and Intralayer Edge States to Control LUMO Energies

Cover Feature: CH₃CN@open‐C₆₀: An Effective Inner‐Space Modification and Isotope Effect Inside a Nano‐Sized Flask (Chem. Eur. J. 47/2023)

CH₃CN@open‐C₆₀: An Effective Inner‐Space Modification and Isotope Effect Inside a Nano‐Sized Flask

Spin‐Crossover Iron(II) Compounds with Pendent Tetraphenylethylene Group

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