Nanostructured systems
constitute versatile carriers with multiple
functions engineered in a nanometric space. Yet, such multimodality
often requires adapting the chemistry of the nanostructure to the
properties of the hosted functional molecules. Here, we show the preparation
of core–shell Pluronic-organosilica “PluOS” nanoparticles
with the use of a library of organosilane precursors. The precursors
are obtained via a fast and quantitative click reaction, starting
from cost-effective reagents such as diamines and an isocyanate silane
derivative, and they condensate in building blocks characterized by
a balance between hydrophobic and H-bond-rich domains. As nanoscopic
probes for local polarity, oxygen permeability, and solvating properties,
we use, respectively, solvatochromic, phosphorescent, and excimer-forming
dyes covalently linked to the organosilica matrix during synthesis.
The results obtained here clearly show that the use of these organosilane
precursors allows for finely tuning polarity, oxygen permeability,
and solvating properties of the resulting organosilica core, expanding
the toolbox for precise engineering of the particle properties.
The novel tetranuclear Pt(IV)-Re(VII) complex [Pt2Me4(OReO3)2(PMePh2)2(µ–bpy-2H)], 4, is synthesized through the reaction of silver perrhenate with new rollover cycloplatinated(IV) complex [Pt2Me4I2(PMePh2)2(µ–bpy-2H)], 3. In complex 4, while 2,2ʹ-bipyridine (bpy) acts as...
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