Carbon nanotubes have three key attributes that make them of great interest for novel membrane applications 1) atomically flat graphite surface allows for ideal fluid slip boundary conditions 2) the cutting process to open CNTs inherently places functional chemistry at CNT core entrance and 3) CNT are electrically conductive allowing for electrochemical reactions and application of electric fields at CNT tips. The entrances to CNT's cores were thus functionalized with a series of tethered molecules and simultaneaous permeation experiments showed gatekeeper activity. Changes in the flux and selectivity where applied bias draws tethered charged molecules into the CNT core hindering/gating flux across the membrane. Entrances of CNTs are functionalized with ferrocene based Josiphos ligands and chiral hydrogenation is demonstrated. Enhancement of catalyst activity on CNT surface is observed.