Browsing by Subject "Porphyrins"
Now showing items 1-20 of 29
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5,10-A2B2-Type meso-Substituted Porphyrins A Unique Class of Porphyrins with a Realigned Dipole Moment
(2011)Abstract: Current applications in porphyrin chemistry require the use of unsymmetrically substituted porphyrins. Many current industrial interests in optics and biomedicine require systems with either push-pull (electron ... -
Bridging the Gap between Porphyrins and Porphycenes: Substituent-Position-Sensitive Tautomerism and Photophysics in meso-Diphenyloctaethylporphyrins
(2011)henylporphyrin (1) is characterized by an inner cavity with a rectangular shape and small NH???N distances. It resembles porphycene, a constitutional isomer of porphyrin known for its strong intramolecular hydrogen ... -
Crystal Engineering Study of Porphyrins, DPMs, BODIPYs, and Cubanes
(Trinity College Dublin. School of Chemistry. Discipline of Chemistry, 2019)This thesis consists of three topics, each covering an aspect of crystal engineering: for porphyrins (Chapter 1), BODIPYs and tris(dipyrrinato)metal(III) complexes (Chapter 2), and cubanes (Chapter 3). Each chapter contains ... -
Delayed release singlet oxygen sensitizers based on pyridone-appended porphyrins
(2017)A new type of porphyrin photosensitizer capable of generating singlet oxygen upon irradiation, storing it through binding to pyridone subunits, followed by slow release at 20‐40 °C is reported. The timescale of singlet ... -
Extroverted Confusion Linus Pauling, Melvin Calvin and Porphyrin Isomers
(2011)No other modern era chemist has influenced chemistry and molecular biology as much as Professor Linus Pauling (1901?1994) (Fig. 1).[1] In a career spanning seven decades he worked and made important contributions in all ... -
Formation of Extended Covalently Bonded Ni Porphyrin Networks on the Au(111) Surface
(2011)The growth and ordering of {5,10,15,20-tetrakis(4-bromophenyl)porphyrinato}nickel(II) (NiTBrPP) molecules on the Au(111) surface have been investigated using scanning tunneling microscopy, x-ray absorption, core-level ... -
High content screening as high quality assay for biological evaluation of photosensitizers in vitro.
(2013)A novel single step assay approach to screen a library of photdynamic therapy (PDT) compounds was developed. Utilizing high content analysis (HCA) technologies several robust cellular parameters were identified, which can ... -
Incremental Introduction of Organocatalytic Activity into Conformationally Engineered Porphyrins
(2019)To study the correlation of macrocycle nonplanarity and catalytic activity of free base porphyrins in detail, a series of six tetraphenylporphyrins with graded degree of β‐ethyl substitution (“H2EtxTPPs” 1–6; x = 0, 2, 4, ... -
Influence of meso-linker attachment on the formation of core···π interactions in urea-functionalized porphyrins
(2020)The ability to cover the face of a porphyrin macrocycle selectively is an attractive feature for concepts such as catalysis and anion binding that are reliant on porphyrin core interactions. Herein, we have synthesized ... -
Molecular Engineering of Free-Base Porphyrins as Ligands-The N-H? ? ? X Binding Motif in Tetrapyrroles
(2019)The core N-H units of planar porphyrins are often inaccessible to forming hydrogen-bonding complexes with acceptor molecules. This is due to the fact that the amine moieties are “shielded” by the macrocyclic system, ... -
Molecular Engineering of Porphyrins as Organocatalysts and Methods Development for New Highly Substituted Porphyrins
(Trinity College Dublin. School of Chemistry. Discipline of Chemistry, 2019)Chapter 1 introduces the N–H…X binding motif in tetrapyrroles, which forms the basis of the research carried out on organocatalytically active porphyrins in Chapters 3.1–3.3. Specifically, the role of porphyrin(oid) ligands ... -
Molekulares Engineering freier Porphyrinbasen als Liganden – das N-H···X-Bindungsmotiv in Tetrapyrrolen
(2019)Die N‐H‐Einheiten im Kern planarer Porphyrine sind oft nicht zugänglich, um Wasserstoffbrückenkomplexe mit Akzeptormolekülen zu bilden. Dies liegt daran, dass die funktionellen Aminogruppen durch das makrozyklische System ... -
Nonplanar Porphyrins by N-Substitution: A Neglected Pathway
(2018)N‐substitution of porphyrins has been a neglected route towards nonplanar porphyrins for the past decades. Previously, they featured in a host of potential medicinal and biochemical applications. However, tailored syntheses ... -
Photochemical Transformations Involving Porphyrins and Phthalocyanines
(CRC Press, 2012)Photochemistry of the porphyrins and their relatives has been largely inspired by photosynthetic processes in nature. As a result of this, most current studies generally utilize the chemistry of magnesium and zinc porphyrin ... -
Platelets, photosensitizers and PDT
(2013)Photodynamic therapy (PDT) has both direct cell and indirect vascular effects. Both are well established and the latter has given rise to specifically target angiogenesis in PDT treatments. While the vascular effects are ... -
Porphyrins in troubled times: a spotlight on porphyrins and their metal complexes for explosives testing and CBRN defense
(2018)Porphyrins are large π-aromatic systems that can complex metal ions from all across the periodic table. The resulting metalloporphyrins are readily tunable with regards to analyte detection properties, and constitute an ... -
Reaction of porphyrin-based surface-anchored metal?organic frameworks caused by prolonged illumination
(2018)Crystalline surface-anchored metal–organic framework (SURMOF) thin films made from porphyrin-based organic linkers have recently been used in both photon upconversion and photovoltaic applications. While these studies ... -
The shape of porphyrins
(2021)Porphyrin molecules are a widely exploited biochemical moiety, with uses in medicinal chemistry, sensing and materials science. The shape of porphyrins, as an aromatic unit, is reductively imagined to be approximately flat, ... -
Silyl Nitronate 1,3-Dipolar Cycloaddition Reactions with meso-Tetraarylporphyrins
(2011)Isoxazoline-fused chlorins were obtained in moderate yields from the reaction of silyl nitronates and 5,10,15,20-tetra(pentafluorophenyl)porphyrin in toluene at 85 ?C. -
Sterically induced distortions of nickel(II) porphyrins ??" Comprehensive investigation by DFT calculations and resonance Raman spectroscopy
(2018)A series of 5,15-disubstituted and 5,10,15,20-tetrasubstituted, and 5,10,15,20-tetrasubstituted-2,3,7,8,12,13,17,18-octaethyl nickel(II) porphyrins in dichloromethane is reported to comprehensively access their sterically ...