Magnetic resonance imaging/fluorescence dual modality protocol using designed phosphonate ligands coupled to superparamagnetic iron oxide nanoparticles
Miktoarm star conjugated multifunctional gold nanoshells: synthesis and an evaluation of biocompatibility and cellular uptake
作者:Vanessa W. K. Ng、Pramod K. Avti、Mathieu Bédard、Tina Lam、Léonie Rouleau、Jean-Claude Tardif、Éric Rhéaume、Frédéric Lesage、Ashok Kakkar
DOI:10.1039/c4tb00722k
日期:——
multifunctional GNS contain lipoic acid (LA) as a model therapeutic agent, poly(ethylene glycol) (PEG350) as a solubilizing and stealth agent, and tetraethylene glycol (TEG) with a terminally conjugated thiol moiety. These GNS have an average size of 40 nm, a shell thickness of 6 nm, a well-defined crystal structure lattice (111), and a surface absorption plasmon band in the near infrared (NIR) region
Shape-Persistent Macrocycles: A Synthetic Strategy that Combines Easy and Site-Specific Decorations with Improved Cyclization Efficiency
作者:Junji Sakamoto、A. Dieter Schlüter
DOI:10.1002/ejoc.200700118
日期:2007.6
A flexible route to shape-persistentmacrocycles based on a collection of building blocks has been devised that allows the easy introduction of several different functional units at predetermined positions and the obtainment of cycles as analytically pure materials in high isolated yields of 22–45 % in the final cyclization process. Each step of the assembly process is based on high-yielding and robust
Designing Miktoarm Polymers Using a Combination of “Click” Reactions in Sequence with Ring-Opening Polymerization
作者:Kunal Khanna、Sunil Varshney、Ashok Kakkar
DOI:10.1021/ma100845a
日期:2010.7.13
The design and synthesis of a well-defined molecular building block with three orthogonal functionalities which facilitate the construction of ABC-type miktoarm star polymers via a combination of sequential Cu-I-catalyzed cycloaddition of an azide to an alkyne ("click") followed by ring-opening polymerization are reported Using this simple and highly versatile methodology, a variety of miktoarm star polymers were prepared which consisted of hydrophilic poly(ethylene glycol) and hydiophobic polystyrene and poly(c-caprolactone) arms Their self-assembly in an aqueous medium was examined using dynamic light scattering and transmission electron microscopy These A BC miktoarm polymers were found to self-assemble into spherical micelles whose core size and hydrodynamic diameter were found to be inversely proportional to the size of the PEG arm. The potential of encapsulating Manna small molecules into these micelles was explored using Disperse Red I dye An enhancement in the loading capacity of the micelles was observed with an increase in the length of the hydiophobic arm
Magnetic resonance imaging/fluorescence dual modality protocol using designed phosphonate ligands coupled to superparamagnetic iron oxide nanoparticles
作者:Tina Lam、Pramod K. Avti、Philippe Pouliot、Jean-Claude Tardif、Éric Rhéaume、Frederic Lesage、Ashok Kakkar
DOI:10.1039/c6tb00821f
日期:——
Easily dispersed in water and fluorescent. Very high r2 and r2* relaxivities. Dye does not influence cell viability of the probe.
在水中容易分散并且发光。具有非常高的 r2 和 r2* 弛豫率。染料不影响探针的细胞存活能力。
Multi-tasking with Single Platform Dendrimers for Targeting Sub-Cellular Microenvironments
Orthogonally functionalised dendrimers have been constructed by using a versatile approach that is widely applicable for therapeutics and diagnostics by combining imaging agents and therapeutics for synergistic effects. Dendrimers containing a covalently linked dipyrromethene boron difluoride (BODIPY) dye and α‐lipoic acid perform complementary biological functions and target intracellular lipid droplets