Abstract A spherosilicate dendrimer (DMS-1) with closely spaced reaction sites (Si [BOND] H groups) on the dendrimer surface has been synthesized by stepwise silylation of double-four- ring silicate with chlorotriethoxysilane (ClSi (OEt) 3) and subsequently with chlorodimethylsilane (ClSiHMe 2). DMS-1 consists of a maximum of 40 Si atoms in the interior frameworks and 24 reactive Si [BOND] H groups on the surface. Because DMS-1 ...