Search Results - "Winter, Arthur"

meso-Methyl BODIPY Photocages: Mechanisms, Photochemical Properties, and Applications by Shrestha, Pradeep, Kand, Dnyaneshwar, Weinstain, Roy, Winter, Arthur H.

“…meso-methyl BODIPY photocages have recently emerged as an exciting new class of photoremovable protecting groups (PPGs) that release leaving groups upon…”
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Solvent Effects on the Stability and Delocalization of Aryl Dicyanomethyl Radicals: The Captodative Effect Revisited by Peterson, Joshua P, Winter, Arthur H

“…The captodative effect postulates that radicals substituted with both electron donating and accepting groups enjoy a special enhanced stabilization, a model…”
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Anti‐Aromaticity Relief as an Approach to Stabilize Free Radicals by Zhang, Rui, Ellern, Arkady, Winter, Arthur H.

“…A new strategy to stabilize free radicals electronically is described by conjugating formally antiaromatic substituents to the free radical. With an…”
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Steric Hindrance Favors σ Dimerization over π Dimerization for Julolidine Dicyanomethyl Radicals by Zhang, Rui, Ellern, Arkady, Winter, Arthur H

“…Metastable radicals exist in a steady-state equilibrium in solution with dimers, which can be either σ dimers or π dimers. Here, we show that steric hindrance…”
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In Search of the Perfect Photocage: Structure–Reactivity Relationships in meso-Methyl BODIPY Photoremovable Protecting Groups by Slanina, Tomáš, Shrestha, Pradeep, Palao, Eduardo, Kand, Dnyaneshwar, Peterson, Julie A, Dutton, Andrew S, Rubinstein, Naama, Weinstain, Roy, Winter, Arthur H, Klán, Petr

“…A detailed investigation of the photophysical parameters and photochemical reactivity of meso-methyl BODIPY photoremovable protecting groups was accomplished…”
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Family of BODIPY Photocages Cleaved by Single Photons of Visible/Near-Infrared Light by Peterson, Julie A, Wijesooriya, Chamari, Gehrmann, Elizabeth J, Mahoney, Kaitlyn M, Goswami, Pratik P, Albright, Toshia R, Syed, Aleem, Dutton, Andrew S, Smith, Emily A, Winter, Arthur H

“…Photocages are light-sensitive chemical protecting groups that provide external control over when, where, and how much of a biological substrate is activated…”
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Efficiency of Functional Group Caging with Second-Generation Green- and Red-Light-Labile BODIPY Photoremovable Protecting Groups by Shrestha, Pradeep, Mukhopadhyay, Atreyee, Dissanayake, Komadhie C., Winter, Arthur H.

“…BODIPY-based photocages release substrates by excitation with wavelengths in the visible to near-IR regions. The recent development of more efficient BODIPY…”
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Efficient Far-Red/Near-IR Absorbing BODIPY Photocages by Blocking Unproductive Conical Intersections by Shrestha, Pradeep, Dissanayake, Komadhie C, Gehrmann, Elizabeth J, Wijesooriya, Chamari S, Mukhopadhyay, Atreyee, Smith, Emily A, Winter, Arthur H

“…Photocages are light-sensitive chemical protecting groups that give investigators control over activation of biomolecules using targeted light irradiation. A…”
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Water-Soluble BODIPY Photocages with Tunable Cellular Localization by Kand, Dnyaneshwar, Liu, Pei, Navarro, Marisol X, Fischer, Logan J, Rousso-Noori, Liat, Friedmann-Morvinski, Dinorah, Winter, Arthur H, Miller, Evan W, Weinstain, Roy

“…Photoactivation of bioactive molecules allows manipulation of cellular processes with high spatiotemporal precision. The recent emergence of visible-light…”
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Structure–Photoreactivity Studies of BODIPY Photocages: Limitations of the Activation Barrier for Optimizing Photoreactions by Dissanayake, Komadhie C., Yuan, Ding, Winter, Arthur H.

“…BODIPY photocages are photoreactive chromophores that release covalently linked cargo upon absorption of visible light. Here, we used computations of the T1…”
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Multiwavelength Control of Mixtures Using Visible Light-Absorbing Photocages by Peterson, Julie A, Yuan, Ding, Winter, Arthur H

“…Selective deprotection of functional groups using different wavelengths of light is attractive for materials synthesis as well as for achieving independent…”
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Solvent-Responsive Radical Dimers by Peterson, Joshua P, Winter, Arthur H

“…An air- and thermally stable aryl dicyanomethyl radical is reported that switches between two dimeric formsa σ dimer and a π dimerby changing the solvent…”
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Spin Delocalization, Polarization, and London Dispersion Forces Govern the Formation of Diradical Pimers by Peterson, Joshua P, Ellern, Arkady, Winter, Arthur H

“…Some free radicals are stable enough to be isolated, but most are either unstable transient species or exist as metastable species in equilibrium with a…”
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Anomalous Electronic Properties of Iodous Materials: Application to High-Spin Reactive Intermediates and Conjugated Polymers by Qiu, Yunfan, Winter, Arthur H

“…Manipulating frontier orbital energies of aromatic molecules with substituents is key to a variety of chemical and material applications. Here, we investigate…”
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BODIPY-Derived Photoremovable Protecting Groups Unmasked with Green Light by Goswami, Pratik P, Syed, Aleem, Beck, Christie L, Albright, Toshia R, Mahoney, Kaitlyn M, Unash, Ryan, Smith, Emily A, Winter, Arthur H

“…Photoremovable protecting groups derived from meso-substituted BODIPY dyes release acetic acid with green wavelengths >500 nm. Photorelease is demonstrated in…”
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The Viologen Cation Radical Pimer: A Case of Dispersion‐Driven Bonding by Geraskina, Margarita R., Dutton, Andrew S., Juetten, Mark J., Wood, Samuel A., Winter, Arthur H.

“…The π bonds between organic radicals have generated excitement as an orthogonal interaction for designing self‐assembling architectures in water. A systematic…”
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Optical and EPR Detection of a Triplet Ground State Phenyl Nitrenium Ion by Qiu, Yunfan, Du, Lili, Cady, Sarah D., Phillips, David Lee, Winter, Arthur H.

“…Nitrenium ions are important reactive intermediates participating in the synthetic chemistry and biological processes. Little is known about triplet phenyl…”
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A Photoactivatable BODIPY Probe for Localization‐Based Super‐Resolution Cellular Imaging by Wijesooriya, Chamari S., Peterson, Julie A., Shrestha, Pradeep, Gehrmann, Elizabeth J., Winter, Arthur H., Smith, Emily A.

“…The synthesis and application of a photoactivatable boron‐alkylated BODIPY probe for localization‐based super‐resolution microscopy is reported…”
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Mechanistic Insight into Phenol Dearomatization by Hypervalent Iodine: Direct Detection of a Phenoxenium Cation by Juneau, Antoine, Lepage, Iannick, Sabbah, Sami G., Winter, Arthur H., Frenette, Mathieu

“…Phenol dearomatization is one of several oxidation reactions enabled by hypervalent iodine reagents. However, the presence of a proposed free phenoxenium…”
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Effect of Structure on the Spin–Spin Interactions of Tethered Dicyanomethyl Diradicals by Zhang, Rui, Peterson, Joshua P, Fischer, Logan J, Ellern, Arkady, Winter, Arthur H

“…Stable organic radicals with switchable spin states have attracted attention for a variety of applications, but a fundamental understanding of how radical…”
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