scholarly journals Tuning Energy Landscapes and Metal-Metal Interactions in Supramolecular Polymers regulated by Coordination Geometry

2021 ◽  
Author(s):  
Nils Bäumer ◽  
Krishnan Kartha Kalathil ◽  
Stefan Buss ◽  
Ivan Maisuls ◽  
Jasnamol P. Palakkal ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Energy Landscape ◽  
Supramolecular Polymers ◽  
Coordination Geometry ◽  
Energy Landscapes ◽  
Metal Interactions ◽  
Metal Metal ◽  
Non Covalent Interactions ◽  
Self Assembled ◽  
Covalent Interactions

Herein, we exploit coordination geometry as a new tool to regulate the non-covalent interactions, photophysical properties and energy landscape of supramolecular polymers. To this end, we have designed two self-assembled...

Strategies to create hierarchical self-assembled structures via cooperative non-covalent interactions

2015 ◽  
Vol 44 (8) ◽  
pp. 2543-2572 ◽  
Author(s):  
Christina Rest ◽  
Ramesh Kandanelli ◽  
Gustavo Fernández
Keyword(s):  
Self Assembly ◽  
Supramolecular Polymers ◽  
Supramolecular Systems ◽  
Multiple Systems ◽  
Cooperative Phenomena ◽  
Non Covalent Interactions ◽  
Self Assembled ◽  
High Degree ◽  
Covalent Interactions ◽  
Degree Of Order

Cooperative phenomena exhibit the basis for the hierarchical self-assembly of multiple systems in nature. Motivated by the high degree of order in these structures, a large number of supramolecular polymers have been designed whose aggregation follows a cooperative pathway. Herein, we have classified the supramolecular systems depending on the cooperative non-covalent forces driving their formation.

Tetranuclear copper(ii) cubane complexes derived from self-assembled 1,3-dimethyl-5-(o-phenolate-azo)-6-aminouracil: structures, non-covalent interactions and magnetic property

2021 ◽  
Vol 45 (5) ◽  
pp. 2742-2753
Author(s):  
Nishithendu Bikash Nandi ◽  
Atanu Purkayastha ◽  
Shaktibrata Roy ◽  
Julia Kłak ◽  
Rakesh Ganguly ◽  
...  
Keyword(s):  
Magnetic Property ◽  
Exchange Coupling ◽  
Antiferromagnetic Exchange ◽  
Non Covalent Interactions ◽  
Cubane Cluster ◽  
Self Assembled ◽  
Covalent Interactions

A new doubly opened 4 + 2 Cu4O4 cubane cluster exhibits strong antiferromagnetic exchange coupling with J1 = −110.1 cm−1, and J2 = −27.1 cm−1.

scholarly journals Probing the Interactions of Porphyrins with Macromolecules Using NMR Spectroscopy Techniques

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 1942
Author(s):  
Ilche Gjuroski ◽  
Julien Furrer ◽  
Martina Vermathen
Keyword(s):  
Nmr Spectroscopy ◽  
Photophysical Properties ◽  
Optical Methods ◽  
Spectroscopic Techniques ◽  
Control Mechanisms ◽  
Dynamic Information ◽  
Non Covalent Interactions ◽  
And Control ◽  
And Diffusion ◽  
Covalent Interactions

Porphyrinic compounds are widespread in nature and play key roles in biological processes such as oxygen transport in blood, enzymatic redox reactions or photosynthesis. In addition, both naturally derived as well as synthetic porphyrinic compounds are extensively explored for biomedical and technical applications such as photodynamic therapy (PDT) or photovoltaic systems, respectively. Their unique electronic structures and photophysical properties make this class of compounds so interesting for the multiple functions encountered. It is therefore not surprising that optical methods are typically the prevalent analytical tool applied in characterization and processes involving porphyrinic compounds. However, a wealth of complementary information can be obtained from NMR spectroscopic techniques. Based on the advantage of providing structural and dynamic information with atomic resolution simultaneously, NMR spectroscopy is a powerful method for studying molecular interactions between porphyrinic compounds and macromolecules. Such interactions are of special interest in medical applications of porphyrinic photosensitizers that are mostly combined with macromolecular carrier systems. The macromolecular surrounding typically stabilizes the encapsulated drug and may also modify its physical properties. Moreover, the interaction with macromolecular physiological components needs to be explored to understand and control mechanisms of action and therapeutic efficacy. This review focuses on such non-covalent interactions of porphyrinic drugs with synthetic polymers as well as with biomolecules such as phospholipids or proteins. A brief introduction into various NMR spectroscopic techniques is given including chemical shift perturbation methods, NOE enhancement spectroscopy, relaxation time measurements and diffusion-ordered spectroscopy. How these NMR tools are used to address porphyrin–macromolecule interactions with respect to their function in biomedical applications is the central point of the current review.

Intense Red‐Blue Luminescence Based on Superfine Control of Metal–Metal Interactions for Self‐Assembled Platinum(II) Complexes

2020 ◽  
Vol 59 (42) ◽  
pp. 18723-18730
Author(s):  
Daisuke Saito ◽  
Tomohiro Ogawa ◽  
Masaki Yoshida ◽  
Junichi Takayama ◽  
Satoshi Hiura ◽  
...  
Keyword(s):  
Blue Luminescence ◽  
Metal Interactions ◽  
Metal Metal ◽  
Self Assembled

scholarly journals Chain stopper engineering for hydrogen bonded supramolecular polymers

2010 ◽  
Vol 6 ◽  
pp. 869-875 ◽  
Author(s):  
Thomas Pinault ◽  
Bruno Andrioletti ◽  
Laurent Bouteiller
Keyword(s):  
Hydrogen Bond ◽  
Molar Mass ◽  
Strong Hydrogen Bond ◽  
Supramolecular Polymers ◽  
Supramolecular Polymer ◽  
Hydrogen Bond Donor ◽  
Linear Chains ◽  
Non Covalent Interactions ◽  
Viscous Solutions ◽  
Covalent Interactions

Supramolecular polymers are linear chains of low molar mass monomers held together by reversible and directional non-covalent interactions, which can form gels or highly viscous solutions if the self-assembled chains are sufficiently long and rigid. The viscosity of these solutions can be controlled by adding monofunctional compounds, which interact with the chain extremities: chain stoppers. We have synthesized new substituted ureas and thioureas and tested them as chain stoppers for a bis-urea based supramolecular polymer. In particular, the bis-thiourea analogue of the bis-urea monomer is shown not to form a supramolecular polymer, but a good chain stopper, because it is a strong hydrogen bond donor and a weak acceptor. Moreover, all substituted ureas tested reduce the viscosity of the supramolecular polymer solutions, but the best chain stopper is obtained when two hydrogen bond acceptors are placed in the same relative position as for the monomer and when no hydrogen bond donor is present.

scholarly journals Reorganization of Self-Assembled DNA-Based Polymers Using Orthogonally Addressable Building Blocks

2021 ◽  
Author(s):  
Serena Gentile ◽  
Erica Del Grosso ◽  
Leonard J. Prins ◽  
Francesco Ricci
Keyword(s):  
Self Assembly ◽  
Rational Design ◽  
Building Blocks ◽  
Binding Domain ◽  
Non Covalent Interactions ◽  
Sticky Ends ◽  
Self Assembled ◽  
Block Structures ◽  
Covalent Interactions

Taking advantage of the addressability and programmability of DNA/DNA non-covalent interactions we report here the rational design of orthogonal DNA-based addressable tiles that self-assemble into polymer-like structures that can be reconfigured and reorganized by external inputs. The different tiles share the same 5-nucleotide sticky ends responsible for self-assembly but are rationally designed to contain a specific regulator-binding domain that can be orthogonally targeted by different DNA regulator strands (activators and inhibitors). We show that by sequentially adding specific activators and inhibitors it is possible to re-organize in a dynamic and reversible way the formed polymer-like structures to display well-defined distributions: homopolymers made of a single tile, random polymers in which different tiles are distributed randomly and block structures in which the tiles are organized in segments.

scholarly journals Progress on Exploring the Luminescent Properties of Organic Molecular Aggregates by Multiscale Modeling

2022 ◽  
Vol 9 ◽  
Author(s):  
Jingyi Zhao ◽  
Xiaoyan Zheng
Keyword(s):  
Multiscale Modeling ◽  
Photophysical Properties ◽  
Luminescent Properties ◽  
Molecular Aggregates ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Intrinsic Mechanism ◽  
Potential Applications ◽  
Non Covalent Interactions ◽  
Covalent Interactions

Luminescent molecular aggregates have attracted worldwide attention because of their potential applications in many fields. The luminescent properties of organic aggregates are complicated and highly morphology-dependent, unraveling the intrinsic mechanism behind is urgent. This review summarizes recent works on investigating the structure–property relationships of organic molecular aggregates at different environments, including crystal, cocrystal, amorphous aggregate, and doped systems by multiscale modeling protocol. We aim to explore the influence of intermolecular non-covalent interactions on molecular packing and their photophysical properties and then pave the effective way to design, synthesize, and develop advanced organic luminescent materials.

scholarly journals Fluorescent supramolecular hydrogels self-assembled from tetraphenylethene (TPE)/single amino acid conjugates

RSC Advances ◽  
2018 ◽  
Vol 8 (37) ◽  
pp. 20922-20927 ◽  
Author(s):  
Nien-Tzu Chu ◽  
Rajan Deepan Chakravarthy ◽  
Nai-Chia Shih ◽  
Yen-Hsu Lin ◽  
Yen-Chu Liu ◽  
...  
Keyword(s):  
Amino Acid ◽  
Single Amino Acid ◽  
Amino Acid Conjugates ◽  
Non Covalent Interactions ◽  
Ph Conditions ◽  
Self Assembled ◽  
Covalent Interactions

TPE-Ser molecules exhibit non-covalent interactions necessary for hydrogelation under physiological pH conditions.

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